A controller is a senior finance professional responsible for overseeing a company’s accounting and financial reporting function. They ensure all financial records, statements, and tax filings are accurate, complete, and compliant with regulations.
At the leadership level, numbers are not just outputs! They are the basis for capital allocation, hiring, pricing, and risk-taking. Yet many businesses use inaccurate financial reports prepared with minimal reporting discipline. The likely consequences?
- Capital gets allocated to the wrong areas, leading to poor ROI
- Hiring decisions are made on flawed cost assumptions, which increases fixed cost pressure
- Cash flow issues emerge due to incorrect visibility into receivables, payables, and expenses
- Compliance gaps increase the risk of penalties, audits, and reputational damage
The solution? Most D2C companies and consumer brands hire a “controller”. This role ensures “financial integrity” by owning your company’s accounting engine. Want to learn how? Read this article to learn who a controller is and what does a controller do.
Who is a Controller?
A controller is a senior finance professional “in charge” of all accounting work in a business. They make sure every financial record is correct, from daily entries to final reports. This includes preparing the:
- Income statement
- Balance sheet, and
- Tax filings.
If any number in these reports is wrong, the controller is responsible for explaining and correcting it. To better learn “what does a controller do,” let’s check out the various roles they perform:
- Recording daily transactions like sales, expenses, and payments
- Maintaining books of accounts and ensuring accuracy
- Preparing financial statements used for decision-making
- Managing audits and tax compliance
- Setting up internal checks to prevent errors or misuse
In a growing D2C company (earning $5M+ revenue) without a Chief Financial Officer (CFO), the controller may act as the senior-most finance person and handle all financial responsibilities. Whereas in larger companies, the controller reports to the CFO.
What Does a Controller Do? 7 Major Duties They are Performing in 2026!
Nowadays, financial control goes beyond basic bookkeeping + reporting. Most businesses now hire senior professionals, like controllers, to remain compliant and prepare accurate financial statements. With time, their responsibilities have expanded due to technological advancements and strict regulations.
Want to know what does a controller do? Below are the seven key duties performed by most controllers in a business setup:
1) Managing the Full Accounting Cycle
A controller supervises the 100% accounting process, from recording daily transactions to producing final financial statements. Every entry made in the general ledger must be correct because it forms the base for all reports. When talking about “what does a controller do,” they primarily oversee key functions such as Accounts Payable (AP) and Accounts Receivable (AR).
Besides, a controller manages payroll, which has strict reporting requirements in the US. For example, Form 941 must be filed every quarter to report income taxes and FICA taxes withheld from employee salaries. The controller ensures that the amounts reported match actual deductions. If the business operates in multiple states, separate state payroll taxes must also be handled.
Next, at month-end and year-end, the controller closes the books. This involves:
- Passing journal entries
- Reconciling all balance sheet accounts
- Recording accruals and deferrals (so that income and expenses reflect the correct period)
2) Producing Internal and External Financial Reports
After closing the books, the controller prepares two types of reports:
- Internal Management Reports
and
- External financial statements
“Internal management reports” are used within the business. These reports help owners and managers evaluate performance and make decisions. They are not bound by strict reporting rules and can include information such as:
- Profit by product line
- Revenue by customer segment
- Performance across different regions
These reports may also include operational data that does not appear in formal financial statements. In contrast, “external financial statements” are prepared for regulators, auditors, and investors. These must follow strict accounting standards. In the United States, companies follow Generally Accepted Accounting Principles (GAAP) under rules such as the SEC’s Regulation S-X. Whereas, international companies may use International Financial Reporting Standards (IFRS).
If we talk about “what does a controller do,” they are responsible for ensuring that:
- Financial statements comply with the required standards
- All disclosures are complete and accurate
- The reports present a true financial position
3) Budgeting, Forecasting, and Variance Analysis
Usually, a controller plans the company’s financial path for the year! This begins with the “annual budget”. Each department prepares its expected income and expenses, and the controller brings all of these into a single master budget. This document acts as the financial plan for the business.
However, the budget is based on assumptions made at one point in time. Since business conditions change regularly, this issue is addressed through regular updates. A controller updates forecasts regularly, often monthly or quarterly. These updates reflect changes in revenue trends, cost levels, and market conditions. This ensures that management is not relying on outdated assumptions.
A key part of this process is “variance analysis”, which examines the difference between planned and actual results.
- If costs exceed the budget, the controller investigates the reason
- If revenue falls short, the controller identifies the underlying cause
For example, suppose direct labor costs exceed the budget by 8%. Now, the controller will determine whether the increase came from overtime, wage changes, or poor scheduling.
4) Sarbanes-Oxley Compliance and Internal Controls
In public companies, the Sarbanes-Oxley Act (SOX) sets strict requirements for financial reporting and internal controls. Let’s check out the two key sections that define this responsibility:
| Section 302 of the Sarbanes-Oxley Act | Section 404 of the Sarbanes-Oxley Act |
Section 302 requires the CEO and CFO to certify that:
and
|
Section 404 requires management to:
and
|
While the CEO and CFO sign these certifications, the controller performs the underlying work. If we talk about “what does a controller do,” this includes:
- Identifying risks in financial reporting
- Designing controls to prevent or detect errors
- Testing whether these controls operate as intended
- Documenting all processes for review by external auditors
Realize that if internal controls are weak, financial statements may contain errors or omissions. This creates legal and regulatory exposure. The controller ensures that the control system is strong enough to support the certifications made by senior leadership.
5) Owning the Accounting Systems and Technology
The controller is responsible for the systems that run the accounting function, commonly known as Enterprise Resource Planning (ERP) systems. These systems record transactions, organize accounts, and generate reports. The controller decides how these systems are set up and used.
Some common platforms used by most D2C companies and consumer brands are:
- Oracle NetSuite (used by mid-sized companies)
- SAP S/ 4HANA (used by large global companies)
- Microsoft Dynamics 365 Finance
Okay, but what does a controller do in this area? Generally, their responsibilities are:
- Designing the chart of accounts
- Defining how transactions flow through the system
- Setting up automated checks to prevent errors
The controller does not just operate the system but takes ownership of its output. If the ERP system produces incorrect data or fails during implementation, the controller is accountable for resolving the issue. This makes the role of a controller both “operational” + “technical”, with a direct impact on the accuracy of financial reporting.
6) Managing Tax Compliance Across Jurisdictions
The controller is responsible for ensuring that all tax obligations are met. This includes federal, state, and local taxes. At the federal level, companies must file a corporate income tax return using Form 1120. This filing reports the company’s taxable income and calculates the tax due.
Realize that tax responsibility extends even beyond income tax. A controller also manages:
- Sales and use tax filings based on transactions in different states
- Property tax filings for business assets
- State income tax returns in each jurisdiction where the company operates
Each of these taxes has its own rules, deadlines, and filing requirements. Errors or delays result in penalties and interest, which directly reduce profits. The controller ensures that:
- All filings are completed on time
- Reported amounts are accurate
- Tax payments match the company’s obligations
This function usually requires coordination across multiple locations if the business operates in more than one state.
7) Managing External Audits and Auditor Relationships
The controller acts as the main point of contact for external auditors. Audits are conducted to verify that financial statements are accurate and comply with required standards. The auditor reviews selected transactions and evaluates internal controls.
Let’s see what does a controller do in this function:
- Preparing financial schedules requested by auditors
- Providing supporting documents for sampled transactions
- Answering questions and addressing audit findings
Realize that the quality of records maintained during the year directly affects the audit process. If records are complete and accurate, the audit progresses without delays. If records are incomplete or inconsistent, the process becomes longer and more complex. Thus, the controller ensures auditors get all the information on time and can proceed with the audit process without any issues.
Searching for a Controller? Hire a Finance Professional from Atidiv Starting at Just $15 Per Hour!
So now you know what does a controller do. A controller is a senior finance professional who takes full responsibility for a company’s financial records, reporting, and compliance. Their main responsibilities include:
- Managing the full accounting cycle, including general ledger, payroll, and closing the books
- Preparing internal reports and external financial statements under GAAP or IFRS
- Leading budgeting, forecasting, and variance analysis to guide business decisions
- Ensuring compliance with laws such as the Sarbanes-Oxley Act and maintaining internal controls
- Handling tax filings, including Form 941 and Form 1120, across jurisdictions
- Managing ERP systems like NetSuite, SAP S/4HANA, and Microsoft Dynamics 365 Finance
Searching for a controller? Hire one from Atidiv in 2026. We are a financial and accounting services provider with 16+ years of experience, maintaining a network of 390,000 chartered accountants and CPAs.
With us, you can hire fractional CFOs or controllers and reduce costs by up to 60% compared to in-house teams. We are highly flexible and easily integrate with platforms like Intuit QuickBooks, NetSuite, Sage, FreshBooks, Zoho, and Xero. To learn more, book a free call today.
FAQs on What Does a Controller Do
1) What is the difference between a controller and a bookkeeper?
A bookkeeper records daily transactions. In contrast, a controller:
- Reviews that work
- Ensures accuracy
- Prepares financial statements, and
- Handles compliance
Additionally, a controller also analyses numbers, manages audits, and builds financial plans. In this way, a controller supervises and takes responsibility for the entire accounting function.
2) How much does a controller cost in 2026?
The CTC of a controller depends on company size, industry, and location. As per data from the Bureau of Labor Statistics, financial managers earn a median salary of about $161,700 per year. Controllers often earn around $121,000 as base pay, with bonuses ranging from a few thousand dollars to over $30,000 based on performance.
3) How can a controller help improve my cash flow?
A controller tracks receivables and payables. They ensure customers pay on time and vendors are managed professionally. Additionally, controllers also identify delays, cost overruns, or weak collection processes. This helps maintain steady cash availability for operations and growth.
4) Is hiring a full-time controller expensive? Are there alternatives?
A full-time controller can be costly for small businesses. To save costs, many companies now hire “fractional controllers”. This gives access to experienced professionals at a lower cost, without maintaining a full in-house team. To hire fractional finance professionals, you may consult Atidiv.
5) What qualifications and experience does a controller usually have?
Most controllers hold a bachelor’s degree in accounting or finance. As an “add-on”, a few controllers may also have a master’s degree, an MBA, and certifications like CPA and CMA. The role usually requires about 10 years of experience, including 5 years in a management role.
