Fractional controller services: what’s included and what to ask before you hire

A fractional controller is a part-time controller who makes sure your numbers can be relied on, explains what changed and why, and keeps a forward view of your cash current, so problems get raised early enough to deal with them. Most work on a monthly retainer for a few hours a week. What separates a good one from a monthly report is continuity: someone who stays with your business between meetings, not just at them.

If you’re reading this, there’s a good chance someone you already trust told you that you need one. This guide explains what that means, what you should and shouldn’t expect, and what to settle before you sign.

Why you’ve been told you need a controller

Owners rarely go looking for a controller on their own. Usually one of two things happens.

Your accountant hits a ceiling. Your in-house accountant or CPA has been keeping up, but the business has grown past what one person can cover. They tell you they can’t do it all, and you need a controller.

Your bookkeeper draws a line. Your bookkeeping service closes your books every month, but when you ask what the numbers mean or what to do next, they tell you that’s not what they do. You need someone who can give you guidance.

Both are telling you the same thing. You have records of what happened. What you’re missing is someone who can tell you what those records mean, what’s coming, and what deserves your attention, every month, without you having to ask.

What does a fractional controller do?

A bookkeeper records what happened. A controller makes sure those records can be relied on, and then looks forward from them. What a controller does that a bookkeeper does not explains the line in more detail.

A typical fractional controller engagement includes some or all of the following:

• Reliable numbers. Reviewing or owning closing the books each month, so the financial statements are accurate and on time.
• An explanation of what changed. Why cash is down, why margins moved, where the business is losing money, in plain language.
• A forward view of cash. A forecast of the coming weeks and months, kept current as things change, with the assumptions written down.
• Plan against actuals. Tracking results against your budget or targets, and flagging when they drift.
• Watching between meetings. Keeping an eye on cash and the numbers that matter, and telling you when something needs attention.
• Following through. Keeping what you decided last month connected to what actually happened since.

The thread running through all of it is continuity. You’re not hiring someone to produce a report once a month. You’re hiring someone who understands your business well enough to notice when something is off and tell you before it becomes a problem.

What’s usually not included

This is where owners are most often surprised. A fractional controller usually doesn’t:

• Do your day-to-day bookkeeping. Some firms bundle bookkeeping into a controller package, but many expect it to be done by someone else.
• Prepare or file your taxes. That’s typically your CPA’s work, though a CPA firm offering controller services may handle both.
• Run payroll.
• Lead fundraising, investor relations or board work. That’s usually CFO territory.
• Make your decisions. A controller gives you the numbers and their view of what they mean. Whether to hire, borrow, raise prices or expand is your call.

Packages vary, and the lines are shifting as firms bundle services differently. So treat this as the usual shape, not a rule, and ask exactly what’s included and what’s billed extra before you sign.

Do you need a controller or a CFO?

The two roles overlap, which is why owners often aren’t sure which one to hire. Here’s the line:

• Hire a controller when you can’t fully trust your numbers, you don’t know where cash is heading, or you can’t explain why things changed. A controller explains what’s happening and keeps the forward view current.
• Hire a CFO when your numbers are solid and you need help with big strategic moves: raising money, setting pricing strategy, an acquisition, a lender negotiation or a board.

Some questions sit on the line. “Where am I losing money?” is a controller question: it’s about explaining what’s happening. “Should I raise prices to fix it?” is a strategy decision, and it belongs to you, with a CFO’s help if you have one.

Order matters, but it’s about the work, not the job titles. A CFO’s advice is only as good as the numbers underneath it. So before you pay for strategy, establish who owns the reliability of your numbers. That might be a controller, or a CFO engagement that includes accounting oversight or brings its own accounting team. What matters is that someone is clearly responsible for it.

How often should you hear from your controller?

Start frequent. If you’re hiring a controller for the first time, meet more often in the first couple of months. You’re setting goals, getting the numbers in shape, and helping them learn how your business really works.

Then let the cadence settle into whatever fits: monthly for most businesses, more often in busy periods or when cash is tight.

But the meeting schedule isn’t really the point. Your business doesn’t run on a monthly calendar, and problems don’t wait for the next call. A good controller is watching your numbers between meetings and tells you when something needs attention. Whether you meet weekly or monthly matters far less than this: are problems getting raised early enough that the two of you can deal with them together, before it’s too late?

That’s the real value of a controller, and it’s the question to hold any engagement to.

How you pay shapes what you get between calls

Fractional controllers typically charge by the hour or on a monthly retainer. In the US, that’s usually $85 to $150 an hour, or roughly $2,000 to $8,000 a month depending on scope. Fractional controller cost breaks down the rates.

Whichever way you pay, continuous attention has to be explicitly included and paid for:

• Billed by the hour: watching between calls takes paid time too. Is that time included in the agreed workload, or does each additional check draw on the same limited hours?
• Monthly retainer: a fixed fee doesn’t guarantee continuous attention. Check whether it covers monitoring between meetings or only the scheduled call and closing the books.

Before you sign, ask directly: if cash drops or a big customer pays late in week two, who notices, how will I hear about it, and does that cost extra?

How will you know it’s working?

Many owners hire a controller and hand everything over, hoping it goes well. It works better to agree up front on what success looks like.

In the first month, agree on two kinds of measures.

• Business measures you’ll watch together: two or three numbers that matter for your business, such as how many weeks of cash you have on hand, how quickly customers pay, or margin on your main product or service. These are shared goals. They tell you how the business is doing, but they move for many reasons, so on their own they don’t tell you whether the controller is doing good work.
• Service measures for the engagement itself: the books closed on the agreed schedule, the forecast refreshed as often as agreed, and material issues raised promptly rather than discovered at the next meeting.

Set the starting point in month one and look at both together every month. A review at three to six months is a sensible checkpoint for the engagement as a whole.

Alongside the numbers, three simple checks:

1. I know where my cash is going, and I get fewer avoidable surprises.
2. I’m watching the right few numbers, the ones that actually tell me whether the business is healthy.
3. I make decisions faster, because I’m not waiting for someone to rebuild the picture each time.

If after a few months none of those are true, the engagement isn’t working, however polished the reports look.

Questions to ask before you hire a fractional controller

1. What exactly will you own? Reviewing the books or closing them? Forecasting? Budget tracking? Ask them to put it in writing.
2. Is bookkeeping included, or do I need a separate bookkeeper?
3. How many hours a month does the fee cover, and what’s billed extra?
4. What happens between our meetings? If cash drops or a big customer pays late in week two, who notices, how will I hear about it, and does that cost extra?
5. How quickly can I expect an answer to a quick question?
6. How often will we meet at the start, and how will that change?
7. What will you need from me, and from my bookkeeper or CPA?
8. Which business numbers and service measures should we use to judge whether this is working?
9. If my books need cleanup first, how is that scoped and priced?

Red flags

• Vague scope. If they can’t say what they own, the hours will drift to whatever feels urgent.
• No agreed measures of success. If nobody defines what good looks like, you can’t tell whether it’s working.
• No agreed monitoring or escalation process. If nobody can explain what gets checked between meetings, who notices a problem, or when you’ll hear about it, you’re paying for scheduled reports rather than ongoing oversight.
• Open-ended cleanup. Cleanup is often needed, but it should be scoped and time-boxed, not an indefinite stream of billable hours.

Where to start

If someone has told you that you need a controller, start with the people who already know your numbers. Talk to your CPA about the possibilities. Many CPA firms offer controller services alongside tax and accounting, and a firm that already knows your books can often get started faster. Ask whether yours does.

Frequently asked questions

What does a fractional controller do?

A fractional controller is a part-time controller who makes sure your financial records can be relied on, explains what changed and why, keeps a forward view of cash current, tracks results against your plan, and raises problems early. The best ones stay with your business between meetings, not just at them.

What is not included in fractional controller services?

Usually day-to-day bookkeeping, tax preparation and filing, payroll, fundraising and board work, and making your decisions for you. Packages vary, and some firms bundle bookkeeping in, so ask exactly what’s included before you sign.

Should I hire a fractional controller or a fractional CFO?

Hire a controller when you can’t fully trust your numbers or don’t know where cash is heading. Hire a CFO when your numbers are solid and you need help with strategic moves like raising money, pricing strategy or an acquisition. Either way, before paying for strategy, make sure someone owns the reliability of the numbers.

How often should I meet with a fractional controller?

More often in the first couple of months while you set goals and get the numbers in shape, then usually monthly. The meeting schedule matters less than whether problems get raised between meetings, early enough to deal with them.

How do I know if my fractional controller is doing a good job?

Agree on two kinds of measures in the first month: two or three business numbers you’ll watch together, like weeks of cash on hand or how quickly customers pay, and service measures for the engagement, like books closed on schedule, forecasts refreshed as agreed and material issues raised promptly. Review both monthly, with a fuller check at three to six months.

Does a fractional controller monitor my business between meetings?

Not always. Under hourly billing, watching between calls draws on the same paid hours unless it’s built into the agreed workload, and some retainers only cover the scheduled call and closing the books. Ask who watches your numbers between meetings, how you’ll hear about problems, and whether that costs extra.

About the author

Nilanjan Raychaudhuri is the founder of AgentLink (Tublian LLC, Columbus, Ohio), which builds an AI controller sold through CPA and fractional CFO firms. He has spent the past year working with practitioners at CPA, accounting and fractional CFO practices on how controller work is actually delivered between calls. Team page

Corrections to nilanjan@agentlink.finance.