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Improve internal controls with these 7 best practices

Improve internal controls with these 7 best practices

Emily Taylor
Contributing writer, BILL
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Internal controls play a crucial role in the success of any company. Are you concerned about the effectiveness of your company's internal controls? Or looking for ways to improve and strengthen them?

This post provides essential knowledge about internal controls—with accounting controls as a specific example—and then lists 7 best practices that can help you:

  • safeguard your assets
  • minimize the risk of fraud
  • and enhance your operational efficiency

You can also download our complete guide to AP internal controls here.

What are internal controls?

Internal controls are just what they sound like—controls that are applied internally, meaning within your organization—as a way to ensure things like accuracy, reliability, and compliance in everything from data management to day-to-day operations.

What are internal controls in accounting?

By that definition, internal accounting controls are the measures and processes that ensure the accuracy, reliability, and integrity of an organization's financial information.

These controls establish policies and procedures to protect assets, help prevent fraud, and promote compliance with financial laws and regulations.

The goal of internal accounting controls is to provide reasonable assurance that financial transactions are recorded accurately and that financial statements are prepared in accordance with applicable accounting standards.

Who usually oversees internal controls?

The responsibility for managing financial control systems usually falls on the finance or accounting department. These departments are responsible for establishing and maintaining effective internal controls to ensure the accuracy and reliability of financial reporting. To do that, they develop and enforce the policies, procedures, and protocols for recording financial transactions and monitoring financial activities.

Additionally, the finance or accounting department is responsible for reviewing and evaluating the effectiveness of these internal control systems regularly to identify any weaknesses or areas for improvement. Ultimately, their goal is to minimize the risk of fraud, errors, and misstatements in financial statements, and to ensure compliance with applicable laws and regulations.

Two types of internal controls for your organization

Internal controls perform two types of jobs—preventing problems from happening in the future and discovering issues that already exist.

  • Preventive controls are designed to identify and address potential issues or weaknesses in processes, systems, and operations before they occur. They protect companies by preventing errors, loss, and even criminal behavior.
  • Detective controls uncover fraud, errors, or irregularities within an organization's operations. These controls include monitoring, auditing, and investigation to detect anomalies or violations of established policies and procedures.

What are the main purposes of internal controls?

Internal controls serve several purposes:

Lower risk

First and foremost, internal controls help safeguard your organization's assets and minimize the risk of mistakes, fraud, and theft. By implementing internal controls, companies can ensure that their financial information is accurate and reliable.

Drive efficiency

Additionally, internal controls help promote operational efficiency and effectiveness by establishing clear procedures and guidelines for employees to follow. This leads to better overall business performance and helps streamline your accounting systems.

Ensure compliance

Finally, internal controls play a crucial role in ensuring compliance with laws and regulations—not just for individual actors but for the company as a whole. By creating policies and guidelines for employees to follow, internal controls also promote ethical behavior generally, both within the accounting department and throughout the organization.

Why are internal controls important?

For most people, our own best interests are very much in line with our employer's best interests. We want our organizations to succeed because we want to keep our jobs, enjoy healthy raises and bonuses, and maintain job security. But even when our intentions are in the right place, we can still make mistakes.

When individual team members are tired, distracted, or just having a bad day, a strong internal control structure can provide the checks and balances needed to prevent accounting errors.

These internal control activities range from reviewing financial reports and accounting records to physical audits of your warehouse inventory. In every area of your organization, internal control procedures are intended to limit relevant risks and ensure effective operations.

Limitations of internal controls

At the end of the day, there's no such thing as a perfect employee—never tired, always impeccably careful, ever-adhering to the ethical values of a patron saint. In other words, even the most well-intentioned people can make mistakes. The right internal control framework (think bank reconciliation or quality control) provides the checks and balances that can prevent honest errors.

But internal controls have at least two main limitations that every company should be aware of:

  1. Bad actors. If your internal controls are up against an intentional bad actor, actively looking for ways to sabotage your operations, there's only so much you can do. Focus your efforts on your organization's biggest risks, and perform a risk assessment on any new hires.
  2. Going too far. Companies that take internal controls to an extreme won't keep good people for very long. Employees want to feel important to their organizations—micro-managing tends to do the opposite. So the key to a successful internal control structure is to expect strict adherence to a set of reasonable policies.

To learn more, stream our webinar on 9 internal control issues that are often overlooked.

Best practices: 7 internal controls for any organization

Each of the principles and best practices below can be implemented in various ways depending on what's best for your organization's unique situation. The important thing is to be sure that your policies are clear and that your controls are being followed.

1. Segregation of duties

Segregation of duties (SoD)—also known as separation of duties—is a fundamental element of internal controls designed to minimize fraud and errors. By distributing responsibilities associated with various tasks, no single person holds all the power, thereby reducing the potential for misuse.

For example, an employee who accepts cash from customers should not be the same person who counts and reports that cash. And the employee tasked with recording financial transactions should not be the one to approve financial transactions.

This separation ensures a system of checks and balances within your corporate accounting function, minimizing the simple risk of human error as well as fraud.

2. Standardized operating procedures

Standardized operating procedures (SOPs) ensure consistency, accuracy, and compliance in the execution of financial processes. These written procedures outline the steps that must be followed for each task, thereby reducing the risk of errors and mismanagement.

To implement SOPs, document the correct procedures for all financial operations—including your segregation of duties—and train your staff on them. Regularly review and update your SOPs to reflect any changes in regulations or business operations.

3. Periodic financial reconciliations

Reconciling the books regularly will help ensure that your company's financial records match up with bank statements, invoices, and other external financial statements. Regular reconciliation helps to catch any discrepancies, errors, or potential fraud early.

The key is to establish a consistent schedule for carrying out reconciliations. This could be daily, weekly, or monthly depending on the volume and complexity of transactions. Using automated reconciliation software can help streamline the process and improve accuracy.

4. Regular internal audits

Regular internal audits are intended to examine and verify the company's financial operations. They ensure compliance with your standardized operating procedures as well as external regulations.

Internal audits can be run by an independent auditor within the organization, or you can hire independent consultants to perform external audits for you. Either way, be sure to set up a regular audit schedule (such as annually or semi-annually), and review the auditor's reports to see if any action is required.

5. Documentation and record-keeping

Good documentation and record-keeping procedures provide a clear audit trail for all financial transactions. This aids in transparency and accountability, and it ensures that transactions can be traced from beginning to end through your accounting procedures.

Make sure your standardized operating procedures include recording every touchpoint of your accounts payable, accounts receivable, spend, and expense management processes. Using a formal document management system to store, organize, and track documents electronically also makes document retrieval easier and more efficient.

6. Strict access controls

Strict access controls ensure that only authorized personnel have access to sensitive financial data and systems. This can significantly reduce the risk of unauthorized access, data manipulation, and theft. It also helps in implementing your segregation of duties.

Be sure to establish user roles and permissions in your financial systems and regularly review and update these permissions. Using strong password policies and multi-factor authentication can also enhance the security of your systems.

7. Automation and technology

Using automation and new technology such as artificial intelligence (AI) and machine learning (ML) can significantly enhance the accuracy and efficiency of accounting processes. It can reduce manual errors, improve data analysis, and free up time for staff to focus on more strategic tasks for your organization.

Evaluate existing processes to identify areas that can be automated. Then, invest in reliable software that fits your business needs. Technology can also help you implement your policies and controls across distributed financial teams.

Improve internal controls with BILL

BILL helps companies automate their financial operations, applying all of these principles (and more) without all the manual effort.

  • Assign roles for built-in access control and segregation of duties
  • Automate your approval procedures and apply them automatically
  • Integrate with your accounting software to make reconciliation easy
  • Get an automatic audit trail of every transaction touchpoint
  • Enjoy unlimited record-keeping and document storage

If you want to apply better internal controls in your financial operations and help your team work more efficiently, explore how BILL applies internal controls automatically.

Author
Emily Taylor
Contributing writer, BILL
With a background in finance and over a decade of experience in business writing, Emily simplifies complex finance topics to help businesses streamline operations, manage cash flow, and make smarter financial decisions.
Author
Emily Taylor
Contributing writer, BILL
With a background in finance and over a decade of experience in business writing, Emily simplifies complex finance topics to help businesses streamline operations, manage cash flow, and make smarter financial decisions.
Get more from BILL
Subscribe to finance insights and thought leadership content delivered straight to your inbox.
By continuing, you agree to BILL's Terms of Service and Privacy Notice.

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Software Comparison

BILL Spend & Expense
Best for AI expense automation
4.5 on G2
  • Smart corporate cards with real-time tracking, flexible limits, and instant visibility into every transaction across your team [1]
  • Unlimited free virtual cards with unique numbers for each vendor or subscription—freeze, delete, or set custom limits instantly to prevent overcharges and reduce fraud risk [5]
  • AI-powered auto-categorization and receipt matching that connects card transactions and expenses into a single reconciliation workflow [1]
  • Customizable budgets with spend controls based on merchant, amount, receipt requirements, and configurable approval workflows [3]
  • Auto-freeze on cards with incomplete transactions, ensuring receipts and documentation are captured before additional spend is approved [1]
  • Up to 7x points on restaurants, 5x on hotels, 2x on recurring software, and 1.5x on all other purchases (rates shown are for weekly or daily billing cycle; rates vary by billing frequency) [2]
  • Two-way sync with QuickBooks, NetSuite, Sage Intacct, Xero, and Microsoft Dynamics; additional integrations with Acumatica, Slack, and HRIS platforms [1]
  • Pro: $0/user/month with all features included—no paid tier to unlock [4]
  • Pro: Merchant controls and auto-freeze cards at no extra cost [1]
  • Pro: Credit lines that don't fluctuate daily based on bank balance [4]
  • Pro: All ERP integrations (NetSuite, Sage Intacct, Xero) included free [1]
  • Con: 12-month holding period before rewards can be redeemed [2]
  • Con: Category reward multipliers cap at $5,000/month per category [2]
  • Con: Less established in global, enterprise-scale expense programs with multi-country regulatory requirements

BILL Spend & Expense pairs corporate cards with AI-powered expense management and budget controls in a single platform at no cost—teams aren't paying per user or upgrading to unlock features that competitors gate behind paid tiers.

Merchant-level spend controls and auto-freeze on incomplete transactions give admins granular oversight without manual policing, and two-way ERP integrations are included free where Ramp and Brex charge for NetSuite and Sage Intacct access. The main trade-off is an initial 12-month rewards holding period before accumulated points can be redeemed. [1][2][3][4]

Commonly compared to: Ramp and Brex (for card-first expense management), and SAP Concur (for enterprise expense programs).

Pricing
$0/user/month with no annual fee
Integrations
Two-way sync with QuickBooks, NetSuite, Sage Intacct, Xero, and Microsoft
Ideal company size
SMB to mid-market
SAP Concur
Best for large enterprises
4 on G2
  • AI-powered receipt capture via ExpenseIt on the SAP Concur mobile app, with smart matching that combines credit card charges and e-receipts into expense reports automatically [7]
  • Configurable approval workflows with built-in audit rules that flag policy exceptions, plus optional Intelligent Audit and Verify add-ons for automated compliance checks [6][7]
  • Modular product suite: Concur Expense, Concur Travel, and Concur Invoice are separate products that can be purchased individually or together, so organizations can start with expense management and add capabilities over time [6]
  • Bank card feed integrations that import corporate card transactions directly into expense reports for automatic reconciliation [6]
  • Joule, SAP's AI assistant, for expense report review, spend analysis, and cost estimation [6]
  • Budget tracking and monitoring tools that give finance teams visibility into spend against departmental or project-level budgets [6]
  • Support for global operations with multi-currency expense reporting and country-specific tax and regulatory compliance tools [6]
  • Pro: 300+ pre-built integrations including native SAP ERP sync [7][8]
  • Pro: Global coverage with multi-currency and regulatory compliance tools [6]
  • Pro: Modular—add travel or invoice management without switching platforms [6]
  • Pro: AI-powered receipt capture and smart matching via ExpenseIt [7]
  • Con: Quote-based pricing; no published rates on the website [6]
  • Con: No corporate card offering; relies on bank card feed integrations [6]
  • Con: Implementation can be complex for smaller organizations [6]
  • Con: Live support requires purchasing the User Support Desk service [6]

SAP Concur is the incumbent in expense management software, with the largest partner ecosystem and broadest global footprint on this list. Its modular approach gives large organizations flexibility to start with expense management and layer on travel or invoice capabilities independently.

The trade-off is complexity—pricing is opaque, there's no corporate card offering, and smaller teams may find the platform more than they need. Organizations already in the SAP ecosystem will get the most value from native S/4HANA integration. [6][7][8]

Commonly compared to: BILL (for SMB expense management), and Coupa (for enterprise spend management).

  • Best for: Mid-market and enterprise organizations that need a globally scalable expense management platform with configurable compliance tools and a large partner ecosystem. [6][7][8]
  • Highlights: AI-powered receipt capture via ExpenseIt, configurable approval workflows with built-in audit rules, optional Intelligent Audit and Verify add-ons for automated compliance checks, 300+ app integrations, and native SAP ERP sync. [6][7][8]
  • Ideal if you need: An expense platform that integrates natively with SAP S/4HANA or other enterprise ERPs, with the flexibility to add modules like Concur Travel or Concur Invoice over time. [6][7]
Pricing
Quote-based
Integrations
QuickBooks, Xero, Sage,TSheets, Gusto, & most business credit cards.
Ideal Company Size
Mid-market to enterprise
Ramp
Best for a broad spend platform
4.8 on G2
  • Corporate cards with customizable spend controls by merchant, category, employee, or department, plus unlimited virtual and physical cards [9][10]
  • AI-powered receipt matching, transaction coding, and memo suggestions that auto-populate as soon as a card is swiped [9]
  • Policy agent that reviews every expense against company policy, auto-approves compliant transactions, and escalates only exceptions with full audit trail [9]
  • Expense submission via SMS, Slack, or Microsoft Teams in addition to web and mobile app [9]
  • Reimbursements for out-of-pocket expenses paid to employees' bank accounts in 1–2 business days [9]
  • Real-time spend reporting with custom dashboards, natural-language queries, and proactive overspend alerts [9]
  • Broader spend platform that includes AP automation, procurement, vendor management, and treasury alongside expense management [9]
  • Pro: Free plan includes corporate cards, expenses, and bill pay [11]
  • Pro: AI policy agent reviews 100% of expenses automatically [9]
  • Pro: Submit expenses via SMS, Slack, or Teams—no app required [9]
  • Pro: Broader spend platform covers AP, procurement, and vendor management [9]
  • Con: Budget tracking requires Ramp Plus at $15/user/month [11]
  • Con: NetSuite, Sage Intacct, and Dynamics integrations require a paid plan [11]
  • Con: HRIS syncs and auto-lock cards require a paid plan [11]
  • Con: Credit limits fluctuate daily based on connected bank balance [12]

Ramp's strength is breadth—it's not just an expense tool but a full spend management platform that includes AP automation, procurement, and vendor management alongside expenses. The AI policy agent is a differentiator, reviewing every transaction against company rules rather than relying on manual manager approvals.

The trade-off is that several features mid-market teams rely on—budget tracking, ERP integrations beyond QuickBooks and Xero, and HRIS syncs—require upgrading to Ramp Plus at $15/user/month plus a platform fee. [9][11]

Commonly compared to: Brex and BILL (for corporate cards and expense management), and SAP Concur (for enterprise expense programs).

  • Best for: Fast-growing companies that want corporate cards, expense management, and accounts payable on a single platform with AI-powered automation. [9][10]
  • Highlights: Corporate cards with built-in spend controls, AI-powered receipt matching and expense coding, a policy agent that reviews 100% of expenses and flags only exceptions, and submission via SMS, Slack, or Microsoft Teams. [9][10]
  • Ideal if you need: A card-first platform where expense management is one part of a larger system that also covers AP, procurement, and vendor management. [9]
Pricing
$0/user/month
Integrations
QuickBooks, NetSuite, Xero, Sage Intacct, Slack, & 100+ accounting tools.
Ideal Company Size
Startups to mid-market
Brex
Best for global teams
4.8 on G2
  • Corporate cards with customizable spend limits by role, department, or category, plus auto-approve for in-policy expenses and auto-decline for out-of-policy spend [13][14]
  • AI-powered expense reviews that auto-approve compliant transactions and surface only exceptions for human review, with clear visibility into why a transaction is flagged [13]
  • Auto-generated receipts and memos with OCR that matches receipts in any language or currency, plus automatic GL coding by department, project, and entity [13]
  • Live Budgets that let department heads set top-level budgets, provision spend to individuals or teams, and track usage in real time with anomaly detection [13]
  • Global reimbursements in 70+ countries in employees' local currency, with subsidiaries able to issue reimbursements from local bank accounts [13]
  • Expense submission and approval via Slack and WhatsApp, with in-app commenting on individual transactions [13]
  • Broader financial platform that includes bill pay, business banking with up to 3.68% yield, and treasury alongside expense management [14]
  • Pro: Free plan includes corporate cards, expenses, bill pay, and travel [15]
  • Pro: AI expense reviews with 99% average policy compliance rate [14]
  • Pro: Global reimbursements in 70+ countries in local currency [13]
  • Pro: Live Budgets with real-time tracking and anomaly detection [13]
  • Con: Live Budgets require Premium at $12/user/month [15]
  • Con: HRIS syncs and customizable ERP integrations require a paid plan [15]
  • Con: Credit limits fluctuate daily based on connected bank balance [16]
  • Con: Multiple expense policies and dynamic review chains require Premium [15]

Brex positions itself as a full financial stack for startups—cards, expenses, banking, and treasury in one platform. The AI expense reviews and 99% average compliance rate (per Brex's internal metrics) are notable, and the global reimbursement coverage across 70+ countries is broader than most competitors on this list.

Like Ramp, Brex gates budget management and HRIS integrations behind a paid tier, and credit limits fluctuate daily based on your bank balance. Teams that need predictable spending power or are past the startup stage may find the pricing structure adds up. [13][14][15]

Commonly compared to: Ramp and BILL (for corporate cards and expense management), and SAP Concur (for enterprise expense programs).

  • Best for: Startups and high-growth companies that want a global financial platform covering corporate cards, expense management, bill pay, and business banking. [13][14]
  • Highlights: AI-powered expense reviews that auto-approve compliant transactions, corporate cards with built-in policy controls, Live Budgets for real-time tracking, global reimbursements in 70+ countries, and OCR receipt matching in any language or currency. [13][14]
  • Ideal if you need: A financial platform built for startups that includes expense management as part of a broader stack with banking, treasury, and AP. [13][14]
Pricing
$0/user/month
Integrations
NetSuite, QuickBooks, Workday,SAP Concur, Slack, & global banking portals.
Ideal Company Size
Startups to mid-market
Expensify
Best for simple reimbursements
4.5 on G2
  • SmartScan receipt capture by photo, email forwarding (receipts@expensify.com), or text message; auto-extracts transaction details and categorizes expenses [17]
  • Bring-your-own-card support: link existing corporate cards from 10,000+ banks globally for automatic reconciliation without switching card providers [17]
  • Expensify Visa Commercial Card with cash back on US purchases; cash back first offsets the Expensify subscription cost, then flows to the company's bank account [17]
  • Concierge AI for automated expense categorization, policy violation flagging, rule enforcement, and error reduction [17]
  • Global reimbursements for employees and independent contractors in their local currency [17]
  • Chat-based collaboration directly on individual expenses to resolve questions in real time rather than through email follow-ups [17]
  • 45+ integrations including QuickBooks, NetSuite, Sage Intacct, Xero, Workday, and Gusto [17]
  • Pro: Bring-your-own-card from 10,000+ banks globally [17]
  • Pro: Expensify Card cash back can offset the subscription cost [17]
  • Pro: SmartScan receipt capture by photo, email, or text message [17]
  • Pro: 45+ integrations including major ERPs and payroll systems [17]
  • Con: No free plan; starts at $5/user/month [18]
  • Con: Pricing structure varies by card spend volume [18]
  • Con: Budget management, advanced approvals, and expense policies require Collect or Control plans [17]
  • Con: No department-level budget management on par with card-first platforms

Expensify's strength is accessibility—it has the lowest barrier to entry for teams that just need to start tracking expenses and submitting receipts. The bring-your-own-card support from 10,000+ banks means companies don't have to switch card providers, and the SmartScan receipt capture (by photo, email, or text) is one of the more flexible input methods on this list.

The trade-off is that several features mid-market teams expect—budget management, advanced approvals, and expense policies—require upgrading to the Collect or Control plans, and spend controls are primarily limited to the Expensify Card rather than extending across all connected cards. [17][18]

Commonly compared to: Zoho Expense (for budget-friendly expense management), and BILL and Ramp (for integrated cards and expenses).

  • Best for: Small and midsize businesses that want a mobile-first expense management tool with flexible card options, including the ability to link existing corporate cards from 10,000+ banks. [17]
  • Highlights: SmartScan receipt capture by photo, email, or text message; bring-your-own-card support from 10,000+ banks globally; Expensify Visa Commercial Card with cash back that offsets subscription costs; and Concierge AI for automated categorization and policy enforcement. [17]
  • Ideal if you need: A lower-cost entry point for expense management where employees can start submitting receipts immediately without switching corporate card providers. [17]
Pricing
From $5/user/month
Integrations
QuickBooks, Xero, Sage, TSheets, Gusto, & most business credit cards.
Ideal Company Size
Small to mid-market
Zoho Expense
Best for budget-conscious teams
4.5 on G2
  • Autoscan receipt capture with OCR that auto-categorizes and itemizes each expense, plus the ability to split or tag expenses across departments, projects, or cost centers [19][20]
  • Automated per diem calculations with pre-defined rules based on country, location, and trip details for regional compliance [20]
  • Corporate card management with real-time feeds that automatically match transactions to uploaded receipts for faster reconciliation [20]
  • Mileage tracking with four input methods across Android, iPhone, and Apple Watch [20]
  • Configurable approval workflows, expense policies, and audit rules with detailed audit trails for compliance [19][20]
  • Custom modules, workflow automation, webhooks, and configurable UI elements for businesses that need tailored expense processes [19]
  • Active-user pricing model: only employees who actually create expenses are charged, so admins and approvers who don't submit reports are free [21]
  • Pro: Free plan available for up to 3 users with core expense tracking [21]
  • Pro: Active-user pricing—admins and approvers aren't charged [21]
  • Pro: Automated per diem calculations by country and location [20]
  • Pro: Deep customization with custom modules and workflow automation [19]
  • Con: Corporate card feeds and multi-level approvals require Standard plan [21]
  • Con: Deepest value requires the broader Zoho ecosystem (Books, People, CRM) [19]
  • Con: No corporate card offering; relies on connecting existing cards [20]
  • Con: Travel booking, per diem, and live budgets require Premium plan [21]

Zoho Expense offers unusually deep customization at a low price point—custom modules, workflow automation, webhooks, and configurable UI elements that most competitors don't expose. The active-user pricing model is genuinely cost-effective for companies where only a portion of employees submit expenses regularly.

The trade-off is that there's no corporate card offering—you'll need to connect your existing cards—and the platform delivers its deepest value when used alongside other Zoho products like Zoho Books and Zoho People. [19][20][21]

Commonly compared to: Expensify (for budget-friendly expense management), and SAP Concur (for global compliance and customization).

  • Best for: Small and midsize businesses that want an affordable, highly customizable expense management platform with strong global compliance features and active-user pricing. [19][20][21]
  • Highlights: Autoscan receipt capture with OCR, automated per diem calculations by country and location, corporate card reconciliation with real-time feeds, mileage tracking across multiple input methods, and active-user pricing starting at $4/user/month. [19][20][21]
  • Ideal if you need: A low-cost expense management tool with deep customization options and native integration with the broader Zoho ecosystem (Zoho Books, Zoho People, Zoho CRM). [19][20]
Pricing
Free (3 users); from $4/user/month
Integrations
Zoho Books, QuickBooks, Xero, Sage, Microsoft Dynamics, & Google Workspace.
Ideal Company Size
Small to mid-market