A Guide To Outsourced Accounting Costs in 2026

Two providers can quote the same business $600 and $2,200 a month for what sounds like identical work. Neither one is overcharging, because that spread shows just how different each service can be and what your books demand.

Outsourced accounting costs $250 to $2,500 a month for most small businesses. Your own numbers depend on how many transactions you run each month, how many entities you file for, what your industry requires, and how much of the work you hand over. All four things you can count on your own before you call anyone, which puts you in a position to judge a quote instead of having to take someone’s word for it.

This guide covers what providers charge, how the three-tier pricing structure works, which factors move your quote up or down, and what the math looks like against an in-house hire.

What Does Outsourced Accounting Cost?

You can expect to pay between $250 and $2,500 a month for outsourced accounting. Bookkeeping alone costs $250 to $2,000 a month. That covers recording your transactions and closing your month, nothing more. Full-service accounting starts at $1,250 because it also includes a controller who reviews the work plus forecasting and analysis on top of the records. The two ranges overlap since a high-volume business paying for bookkeeping alone can spend more than a smaller business buying the full package. 

From there, the cost of outsourced accounting comes down to your transaction count, the number of entities you file for, how much your books need to be cleaned up, and the specialized work your industry demands. All four factors affect the number. 

What Sits at the Low End

This is where you’re buying monthly reconciliation, categorized transactions, and a profit & loss (P&L) statement and balance sheet after each month closes. It’s ideal for single-entity businesses with a low transaction volume, so nobody has to consolidate statements or track intercompany activity. Your books stay current and your tax preparer gets clean records at year-end.

The businesses buying at this level tend to be quite small. The median US small business brought in $125,200 in revenue in 2025. If your company makes more than that, then it already out-earns more than half of all small businesses in the country. That’s a sign you’ve outgrown basic outsourced bookkeeping and belong further up in the range.

What Sits at the High End

Your engagement now covers multiple entities, consolidated statements, cash flow forecasting, and investor reporting, with a controller and a fractional CFO working with the bookkeeper. Each of those people bills at a higher rate than the one below them, so the price climbs with the seniority levels you add to your engagement.

You can expect to pay $40 to $90 per hour for bookkeeping services and $175 to $400 per hour for CFO advisory. One hour of strategic work costs what four hours of transaction coding does, which is why adding a few hours of senior attention each month hits your invoice harder than the volume behind it might suggest.

What Pricing Models Do Outsourced Accounting Providers Use?

Providers bill by the hour, by a flat monthly package, or by your transaction count. Knowing which structure you’re being quoted matters more than the number attached to it, since you can’t compare an hourly quote and a flat-rate quote until you convert one into the other.

Hourly Billing

Hourly works best for defined work with a clear endpoint, like migrating your accounting system or cleaning up a year of neglected books. You can add or reduce hours depending on your needs, with the caveat that you won’t know your exact bill until the work is done. Outsourced firms generally charge between $40 and $90 an hour at this level.

Ask who’s doing the work if a provider quotes you well under that. A staff accountant earning the 2026 midpoint salary of $73,750 costs their employer about $35 an hour in wages alone, before benefits or payroll taxes. A firm charging you $25 an hour has to make that number work somehow, usually by assigning your books to someone junior or outsourcing their service overseas. 

Flat-Rate and Tiered Packages

Providers who bill flat rates quote you one monthly number against a written scope, so you know exactly how much you’ll pay before the month starts. That scope tells you how many accounts your bookkeeper will reconcile and how many transactions your fee covers. Any work outside those limits is billed separately.

Tiered pricing takes the same idea and splits it into levels, where each tier adds work on top of the one below it. You move up a tier when your transaction volume outgrows the one you’re on or when you want more senior financial advice. 

One thing to keep in mind is that your flat rate will likely only hold for a year or two. More than eight in ten tax and accounting professionals raise their fees every two years or sooner, typically by 6% to 10%. Ask every prospective provider what triggers an increase and how much notice you get before they apply one.

Per-Transaction and Volume-Based Pricing

Some providers price your engagement off how many transactions you run each month. That usually includes a base fee plus a set amount per transaction beyond the threshold. For example, a provider could quote $400 a month for 100 transactions, then bill $2 for each one past that.

The important thing to do here is model any quote like this against next year’s expected volume before you sign. Two quotes can match today and be completely different a year from now if you’re expecting growth. Always run the numbers on the volume you have today plus the volume you expect one and three years from now before you sign a per-transaction engagement.

What Factors Drive Outsourced Accounting Costs Up or Down?

Your transaction count, the number of entities you file for, how far up the ladder your services go, and the demands specific to your industry each add hours or seniority to the work. Two businesses at identical revenue levels can pay very different monthly fees once you factor these in, which is why a quote you heard from another business owner doesn’t tell you much about your own costs.

Transaction Volume

Your bookkeeper codes and reconciles every line that enters your books, so your monthly transaction count directly affects how much work they do for you. That count includes every bank deposit, credit card charge, customer invoice, and vendor bill you process.

The thing to note here is that revenue doesn’t tell you much about that number. A retail shop processing 800 card transactions a month requires far more work than a consulting firm sending 12 invoices at the same revenue. Always pull last month’s bank and credit card statements and count the lines before you call any provider, since that number is the first thing they’ll ask for.

Entity Structure

A sole proprietorship files one return against one set of books, which is the cheapest structure to maintain. An S-corp or a partnership adds payroll filings, owner distributions, and a separate business return, so your bookkeeper tracks basis and distributions that a sole proprietor never has to deal with.

On top of adding more work, multiple entities make everything more complicated. Each one has its own books, its own bank accounts, its own chart of accounts, and its own return. Anything moving between them creates intercompany transactions that your accountant has to record twice and eliminate when they consolidate your statements. If you own a holding company with three operating subsidiaries, that means you’ll have four separate books to balance before anyone starts on the consolidated statements that tie them together.

Scope of Services

What you ask your provider to do affects your bill more than any other factor here. A bookkeeper only records your transactions and closes your month. A controller reviews that work and builds your cash flow forecast. A CFO can build financial models, prepare your investor reports, guide you through a raise or a sale, and plan an exit. 

Each level costs more per hour than the one below it. Adding a controller roughly doubles your hourly rate, and adding a CFO doubles it again. You might not need all three at once, as plenty of businesses stick to bookkeeping alone for years until they’ve grown big enough to need a controller. Many don’t ever need a CFO on their team. Our guide to CFO services covers when the upgrade makes sense. 

Industry Complexity

Your industry affects how much specialized work your books need each month, and providers price accordingly. These are some of the industries that require specialized accounting:

• Law firms: The firm holds money that belongs to the client. State bar rules require that money to stay in a separate account with proof every month that nobody touched it. The bookkeeper reconciles that account by matching the bank statement, the firm’s ledger, and each client’s individual balance. An error here could involve the bar, which is why accounting for law firms is so important. 
• Construction companies: A contractor needs to know whether a specific job made money, so the bookkeeper has to code every labor hour and every material invoice to that specific project. 
• SaaS companies: A customer pays $60,000 in January for a year of software. Even if the company gets the full $60,000 upfront, it still hasn’t earned all of that money because it still owes eleven more months of service, so the bookkeeper counts $5,000 as revenue in January and the remaining $55,000 as a debt the company owes its customer. Each month, they move another $5,000 from that debt into revenue, which takes a second schedule to maintain along with the regular books.
• Real estate businesses: An owner depreciates each building over decades, which means the accountant needs to track a separate schedule per property. Many owners also hold each property in its own LLC, which stacks the entity work on top of the industry work.

Ask any provider what they’ve handled in your industry before you sign. Someone learning your rules on your books will cost you more than the hours show. 

A Worked Example

Two businesses at $2 million in revenue can pay very different monthly fees for their accounting. For example, a ten-person marketing agency that runs everything through one entity and bills clients on standard terms is completely different from a SaaS company that sells contracts upfront and holds its intellectual property in a second entity. Here’s how the two compare:

Factor	Marketing agency	SaaS company	Why it affects the price
Monthly transactions	About 150	About 400	More lines to code and reconcile means more hours
Entities	One	Two, one operating and one holding IP	The bookkeeper maintains separate books for each and eliminates charges between them
Industry rules	Standard accrual accounting	Deferred revenue schedules for every annual contract	The SaaS company needs a second schedule in addition to the regular books
Services needed	Bookkeeping and monthly statements	Bookkeeping plus controller review for quarterly investor reporting	Controller hours cost roughly double bookkeeping hours

Is It Cheaper to Outsource Accounting or Hire In-House?

Outsourcing wins until you have enough accounting work to keep someone busy all week. Below that point you’re paying full-time salary for part-time output.

Finding that point is the tricky part. Any in-house vs. outsourced accounting cost comparison starts with the hours, so count how many you need before you decide. If your books take 15 hours a month, an outsourced provider will bill you for 15 hours, while a full-time employee would bill you for a full month’s work. Once your transaction volume, entity count, reporting requirements, and industry rules add up to something close to a full schedule, the full-time employee starts making sense. 

A staff accountant earning the 2026 midpoint salary of $73,750 costs you closer to $105,000 a year once you add the 43% that benefits and payroll taxes contribute on top of every salary dollar. That number still leaves out what you’ll spend to recruit them, the software they need, and the months you go without coverage when they take leave or quit. Compare that against the $1,250 to $2,500 a month full-service outsourced accounting engagements cost and the difference is quite big. This is how the two compare:

Cost	In-house hire	Outsourced engagement
Base salary or fee	$73,750 a year, according to the median	$15,000 to $30,000 a year
Benefits and payroll taxes	About $31,000 a year	Included in your fee
Software licenses	You buy them separately	Usually included or passed through at cost
Coverage during absence	Your books wait until they return	The firm assigns someone else
Seniority available	One person’s skill level	Bookkeeper through CFO on the same account

What Hidden Fees Should You Watch For?

Watch for the charges that fall outside the scope you agreed to. Your monthly fee covers a defined list of work, and anything past that list is billed separately at rates you may never have discussed. Those add-ons are what push your real outsourced accounting services costs above the number on your quote. These are the ones that catch owners off guard:

• Catch-up and cleanup work: Your provider could quote a monthly fee to keep your books current, then bill separately for eight months of unreconciled transactions you’re handing over. Ask what they charge for cleanup and how many months they think they need before you sign your contract.
• Setup and onboarding: Building a new chart of accounts and migrating your data into a new system takes a lot of time. Some firms charge a one-time fee worth a month or two of work plus additional billable hours.
• Software passed through: This could include your monthly subscription for your accounting platform, your receipt capture tool, your bill pay software, and any payroll system your provider connects to. Some firms fold these costs into the monthly fee, but not all do.
• Overage charges: A tiered package covers a set number of transactions. Going over that limit triggers a per-transaction charge or an automatic bump to the next tier. Ask if your provider warns you before either happens.

How Does Milestone Approach Outsourced Accounting Pricing?

Milestone prices around three levels of service with published rates for each of them. Bookkeeping costs $40 to $90 an hour, controller-level work costs $100 to $175 per hour, and CFO advisory costs $175 to $400 an hour, with full packages starting at $1,250 per month. Those three bands map to three levels of service. A dedicated senior bookkeeper, controller, and fractional CFO all work the same account together, so you can add seniority without changing providers or re-explaining your business to a new team.

Each level builds on the one below it:

• Bookkeeping: Covers reconciliation, categorized transactions, your monthly P&L statement and balance sheet, and your year-end close prep.
• Controller: Adding a dedicated controller who reviews the bookkeepers’ work and does cash flow forecasting and budget variance analysis can be instrumental for companies in the right stage.
• CFO: This level of executive advice adds financial modeling, investor reporting, and support through a raise or sale. 

Milestone also handles your HR and payroll needs. When you hire your tenth employee, the team already doing your books adds them to payroll and handles the paperwork so you never have to find a second vendor or explain your business twice.

Ready to See What Outsourced Accounting Would Cost for Your Business?

Every range in this guide is a starting point, not a quote. Your number depends on how many transactions you do every month, how many entities you file for, what your industry requires, and how far up the ladder your services go.

Pull your last bank and credit card statements and count the transaction lines before you call anyone. Write down how many entities you file for and what your books look like right now, including any months nobody has reconciled. A provider can quote you accurately with those numbers in hand. Then, you’ll be able to compare what different firms tell you.

Milestone designs a scope around your transaction volume, your entity count, your industry requirements, and the level of support you need. We suit your needs, not the other way around. Schedule a free consultation to find out what your business would cost to support. 

Frequently Asked Questions About Outsourced Accounting Costs

Is Outsourced Accounting Cheaper Than Hiring In-House for a Small Business?

Usually yes. A full-time accountant costs you a salary plus benefits and payroll taxes whether your books need 15 hours a month or 150, while an outsourced provider only bills you for the work you need. Count how many hours your books take before you decide, since the full-time hire only makes sense once that number approaches a full schedule.

What’s a Fair Monthly Price for Basic Bookkeeping Versus Full-Service Accounting?

Bookkeeping alone costs $250 to $2,000 a month, and full-service accounting starts around $1,250. The ranges overlap because volume drives bookkeeping pricing while scope drives full-service pricing. A high-volume retailer buying bookkeeping alone can pay more than a low-volume consultancy buying the full package.

Do Outsourced Accounting Fees Typically Include Tax Preparation, or Is That Separate?

It depends on the provider. Full-service engagements often include tax preparation, while bookkeeping-only arrangements almost never do. Ask which applies before you sign. If your package doesn’t include tax preparation, budget $1,000 to $3,000 for a business return if you’ll be hiring that out separately.

How Do I Compare Quotes From Providers Using Different Pricing Models?

Convert every quote to a yearly number, then list what each one includes. An hourly quote needs an estimate of monthly hours, and a per-transaction quote needs the volume you expect a year from now. A $900 package covering everything can cost less than a $600 one that bills cleanup, software, overages, and onboarding separately.

Will I Lose Visibility or Control Over My Books by Outsourcing?

No. Your books stay in QuickBooks, Xero, NetSuite, or Sage accounts and you keep the login. Most providers also set a monthly or quarterly call to walk you through your financials, which gives you more visibility into your numbers than you’d get from an employee down the hall. Ask any provider if they work with your systems or with theirs, and whether you can export everything if you leave.