How Much Does Outsourced Bookkeeping Cost Per Month?
Outsourced bookkeeping for a small to mid-sized professional services firm typically costs between $750 and $2,500 per month. Most firms in the $1M to...
Outsourced bookkeeping for a small to mid-sized professional services firm typically costs between $750 and $2,500 per month. Most firms in the $1M to $5M revenue range land in that band depending on transaction volume, compliance requirements, and the number of entities involved (Breakwater Corp, 2025).
That is the direct answer. But if you have been burned by an outsourced bookkeeper before, price is not your first question. Your first question is what you are actually getting for it, and whether the person on the other end of that engagement will catch a trust account discrepancy before you do.
You caught the last one yourself. Three months after it happened. While reviewing a client matter that had nothing to do with bookkeeping, you noticed a balance that did not match the distribution statement your bookkeeper had prepared. You called. Got a vague explanation. Got a corrected document two days later with no explanation of how it happened or what else might be wrong. That is what poor bookkeeping looks like at its worst: not the error itself, but the silence around it.
This article gives you the real numbers, a framework for what drives cost up or down, and a worked example for a law firm at your revenue level so you can walk into any vendor conversation knowing whether the quote you receive is fair.
Key takeaways
- Most professional services firms at $1M to $5M in revenue pay $750 to $2,500 per month for outsourced bookkeeping.
- Five variables determine where you land in the range: transaction volume, number of entities, payroll complexity, compliance requirements, and whether cleanup is needed before service begins.
- Fully loaded in-house bookkeeping costs $5,800 to $7,100 per month once salary, taxes, benefits, and software are included. Outsourcing is typically 40 to 60% cheaper (Breakwater Corp, 2025).
- Compliance-specific work, such as IOLTA three-way reconciliation and partner distributions, requires a credentialed team. It does not belong in the basic or standard tier.
- The most common failure mode in outsourced bookkeeping is not price. It is poor communication and a generalist firm that does not understand profession-specific compliance requirements.
What does outsourced bookkeeping cost per month?
For most small businesses, outsourced bookkeeping runs $300 to $2,000 per month (ZIS Consultants, 2024; usehaven.com, 2025). For small to mid-sized businesses with more complexity, that range extends to $500 to $5,000 per month (Breakwater Corp, 2025). Professional services firms at the $1M to $5M revenue level, with payroll, compliance-specific accounting, and monthly reporting requirements, typically land in the $750 to $2,500 range.
The four pricing tiers and what you get at each one
Price is a function of scope, not just business size. A solo consultant with 80 transactions per month and no employees is a completely different engagement than a law firm managing IOLTA trust accounts, multi-state payroll, and quarterly partner distributions.
| Tier | Monthly Range | Typical Scope |
|---|---|---|
| Basic | $300 to $750/mo | Transaction categorization, bank reconciliation, basic reports |
| Standard | $750 to $1,500/mo | Month-end close, P&L and balance sheet, payroll coordination |
| Full-Service | $1,500 to $3,500/mo | AR/AP management, financial reporting, CPA coordination, compliance-heavy or multi-entity work |
| Outsourced Accounting Department | $3,500 to $12,000+/mo | Controller-level oversight, CFO advisory, board reporting |
Sources: Breakwater Corp (2025), Karbon HQ pricing guide, ZIS Consultants (2024).
Most professional services firms sit in the Standard to Full-Service range. Whether you land closer to $750 or $3,500 depends on the five variables in the next section.
What drives your monthly bookkeeping cost up or down?
“It depends” is a real answer. It just should never arrive without the variables that do the determining. A law firm with one IOLTA trust account, 14 employees on payroll across two states, and quarterly partner distribution calculations is not the same pricing conversation as a consulting firm with one owner, two contractors, and 60 transactions per month.
Transaction volume
Transaction volume is the base unit most outsourced firms use to set an opening price. Higher volume means more time to categorize, reconcile, and close each month. A consulting firm running 75 transactions per month prices differently than a law firm with 300 movements across trust and operating accounts, client retainer disbursements, and vendor payments.
If you do not know your monthly transaction volume, pull three months of bank statements and count the line items across all accounts. That number is the first thing any reputable outsourced firm will ask for.
Multiple entities and locations
Each additional entity requires its own set of books, its own reconciliation, and its own reporting. A three-partner firm operating under one entity is one engagement. A practice with two locations and a holding company is three. The bookkeeper’s time scales with the number of entities, and so does the price.
This is not a gotcha. It is the structural reality of multi-entity accounting. If you have entities you have not disclosed to a vendor, do it upfront. Discovering them after onboarding is a renegotiation you do not want.
Payroll complexity
Multi-state payroll, contractor classification, and production-based compensation are common in law and medical practices, and each factor adds compliance risk and processing time to every payroll cycle.
A firm with 14 employees split across two states, plus W-2 associates and contract staff with different compensation structures, is not a standard payroll engagement. It requires someone who understands the withholding rules in both states and can flag classification issues before they become penalties.
Compliance requirements specific to your profession
This is the cost driver most generic pricing guides miss entirely. IOLTA trust account reconciliation, three-way reconciliation for law firms, insurance remittance reconciliation for medical practices, and partner distribution calculations are not bookkeeper-level tasks. They require professional accounting credentials and the liability that comes with them.
Firms that need this level of compliance oversight will not find it in the basic or standard tier. They will find it with a team that includes staff accountants and CPAs, not a solo bookkeeper with no professional accountability structure. At Accountally, the team handling law firm engagements includes credentialed accountants who understand IOLTA rules specifically, not just trust accounting in the abstract.
Cleanup work required before ongoing service begins
If your books are behind, expect to pay for cleanup separately from the ongoing monthly retainer. Cleanup is scoped by complexity: how many months are behind, whether the chart of accounts needs restructuring, and whether prior-year records require reconciliation.
Accountally scopes file review and cleanup across three complexity tiers, with the ongoing monthly fee beginning once the books are current. This matters for budgeting: the first two or three months may cost more than the steady-state retainer if there is backlog to clear. A firm that quotes you a flat monthly rate without asking about your current book state is either not asking the right questions or planning to surface the cleanup cost later.
What do you actually get for the monthly fee?
A common question from firms evaluating outsourced bookkeeping: “What does a monthly bookkeeping service actually do each month?” It is the right question, and the answer should be specific enough that you can hold the vendor accountable to it.
The core monthly deliverables at every tier
A standard month-end close includes transaction categorization across all accounts, bank reconciliation against statements, a P&L and balance sheet delivered to you, and financials ready for your CPA or partners to review. These deliverables should arrive on a consistent date every month, without you having to ask.
That last sentence is not a small thing. The consistent date, the proactive delivery, the absence of a chase email from your office manager asking whether the books are closed yet: those are deliverables too. They are the ones your last bookkeeper failed to provide.
Accountally closes books early in the month so clients have current financials before mid-month, not after the decisions they inform have already been made.
What full-service adds above the baseline
At the $1,500 to $3,500 per month tier, scope expands beyond close-and-report. Accounts receivable and payable management, payroll coordination, CPA liaison work, and compliance-specific deliverables come into scope.
For a law firm managing client retainers, trust disbursements, and multi-partner equity, this tier is not a premium. It is the minimum viable scope to do the job correctly. IOLTA three-way reconciliation does not belong at the $750 tier. Neither do partner distribution statements that four partners will scrutinize before signing off.
The Royal Revenue System, Accountally’s internal methodology for analyzing client financials, runs as part of the monthly process at this tier. It proactively flags financial issues before they surface in a partner meeting or, worse, in a bar audit. That is a structured review process, not a marketing claim, and it is one your previous bookkeeper almost certainly did not have.
How does outsourced bookkeeping compare to hiring in-house?
If you are considering bringing someone in-house instead of outsourcing, do the math before you post the job.
What a fully loaded in-house hire actually costs
The Bureau of Labor Statistics puts the median bookkeeper salary at $49,210 per year, or $23.66 per hour, based on May 2024 occupational data (cited by NerdWallet and Forbes Advisor). That is the salary line. It is not the cost.
Once you add employer payroll taxes, health insurance, paid time off, retirement contributions, and software, a single in-house bookkeeper costs $70,000 to $85,000 per year fully loaded, or $5,800 to $7,100 per month (Breakwater Corp, 2025, citing BLS employer cost data). Benefits alone average approximately $13,000 per employee per year based on BLS Employer Costs for Employee Compensation data (OneBridge Accounting, 2025).
That is for one person. One person who may not hold a CPA credential, may not understand IOLTA compliance, and creates a single point of failure the moment they take a job at a firm down the street.
What you get for $1,000 to $2,500 per month outsourced
Outsourcing at $1,000 to $2,500 per month eliminates a significantly larger overhead position, replaces a single generalist with a team that includes credentialed accountants, and builds in compliance oversight a solo in-house hire cannot provide.
Outsourcing is typically 40 to 60% cheaper than hiring in-house (Breakwater Corp, 2025). Accountally clients report saving an average of $3,000 or more per month compared to in-house alternatives.
The frame you can bring to a partner meeting: “We spend $1,800 a month and eliminate a $6,500-a-month overhead position, while getting a team with CPA credentials that actually understands trust accounting.”
Worked example: What does a law firm with eight attorneys actually pay?
Abstract comparisons are useful. A concrete example is more useful. Here is one you can apply to your own situation.
The firm profile and scope
Eight attorneys. One office manager. One IOLTA trust account. Payroll for 14 employees, including W-2 associates and two 1099 contractors, across two states. Quarterly partner distribution calculations. Monthly CPA coordination for estimated taxes and quarterly reviews.
Current state: the previous bookkeeper left four months ago. The office manager has been patching the books together three to four hours per week. A partner caught a trust account discrepancy two months after it happened while reviewing a client matter unrelated to accounting. No one is certain whether it was an isolated error or part of a pattern.
Where this firm lands on the pricing tiers and why
Walk the five price drivers:
Transaction volume: Moderate to high. Trust account movements, retainer deposits and disbursements, operating account vendor payments, and payroll transactions combined likely exceed 250 movements per month. This is not a basic-tier engagement.
Entities and locations: Single entity, two office locations. Not a multi-entity structure, but two-location payroll and expense allocation adds complexity.
Payroll complexity: 14 employees across two states, with a mix of salaried associates, hourly support staff, and 1099 contractors. Multi-state withholding and contractor classification review are required. This adds to the baseline.
Compliance requirements: IOLTA three-way reconciliation is non-negotiable. Partner distribution calculations must be accurate enough that four partners sign off without dispute. This pushes the engagement firmly into the full-service tier.
Cleanup required: The office manager kept current records, even if not clean ones. Cleanup is limited to the last four months, which is manageable. It adds a one-time scoped fee but does not dramatically change the ongoing retainer.
Conclusion: This firm lands in the $1,500 to $2,200 per month range for ongoing full-service outsourced bookkeeping, with a one-time cleanup fee for the four-month backlog scoped separately.
If Accountally’s Royal Revenue System had been running on this engagement, the trust account discrepancy would have been flagged at month-end, not caught by a partner two months later. That is what proactive financial oversight looks like in practice.
What are the real disadvantages of outsourced bookkeeping?
You have lived the downside of outsourced accounting already. Here is an honest accounting of what goes wrong and what to screen for before you sign.
The three risks that matter for professional services firms
Communication gaps. This is the most common failure mode. Poor communication with a current or previous bookkeeper appeared in 21 discovery calls across Accountally’s client pipeline. It is the seventh most common pain point across all verticals and, for professional services firms, the most likely reason a previous engagement failed. A bookkeeper who does not communicate proactively is not a bookkeeper you can trust with compliance-sensitive work. Ask any vendor you evaluate: what is your communication turnaround time, what happens when something is wrong, and how do I find out about a discrepancy?
Onboarding creates a temporary blind spot. Any transition to a new bookkeeper involves a period where the new firm is learning your accounts, your chart of accounts (COA), and your compliance requirements. For a law firm, this window carries real risk. Ask the vendor how they handle trust account oversight during onboarding, and whether they will review prior work before taking over the ongoing close.
A generalist who does not understand your profession’s compliance requirements. This is the risk most firms discover six months into an engagement. Ask directly: have you handled IOLTA three-way reconciliation before? Can you show me a partner distribution statement your team has prepared? If the answer is vague, the risk is real.
What to look for instead
A credentialed team, not a solo bookkeeper. A defined communication cadence, not a promise to “be available.” Industry-specific experience demonstrated through specifics, not asserted through marketing language. Transparent pricing with clear scope so you know what is included and what triggers a change order.
These are not premium features. They are the baseline of what a professional services firm should expect from an outsourced accounting partner.
Frequently asked questions
How much does outsourced bookkeeping cost per month for a small business?
Most small businesses pay between $300 and $2,000 per month for outsourced bookkeeping depending on transaction volume, complexity, and scope (ZIS Consultants, 2024; usehaven.com, 2025). Professional services firms with compliance-specific needs, payroll complexity, or multi-state operations typically fall in the $750 to $2,500 range. The broad range reflects real variation in scope. A solo consultant and a law firm with 14 employees are not the same engagement.
What do freelance bookkeepers charge per hour?
The national average for a freelance bookkeeper is $22.75 per hour, with a range of $17.01 to $28.48 per hour (FitSmallBusiness, updated February 2025). On platforms like Upwork, the average runs closer to $43 per hour (NerdWallet, 2025). Controller and advisory-level work from a CPA runs $100 to $150 per hour (Steph’s Books, 2025). Hourly rates are useful for scoping one-time projects. For ongoing monthly bookkeeping, a fixed monthly retainer gives you predictable costs and removes any incentive for the bookkeeper to work slowly.
What are the disadvantages of outsourced accounting?
The three most common failure points are poor communication, onboarding gaps that create temporary blind spots, and generalist firms that do not understand profession-specific compliance requirements such as IOLTA reconciliation or partner distributions. These risks are avoidable. Ask the right questions before you sign: what is the communication turnaround time, what does onboarding look like for a compliance-heavy engagement, and can the firm demonstrate prior experience with practices like yours.
How much should I pay someone to do my bookkeeping?
The right number depends on scope. For a professional services firm at $1M to $5M in revenue with payroll and compliance requirements, $1,000 to $2,500 per month for a full-service outsourced team is a well-supported range. Compare that to the fully loaded cost of an in-house hire: $70,000 to $85,000 per year, or $5,800 to $7,100 per month, before a single partner distribution statement goes out the door (Breakwater Corp, 2025).
Is outsourced bookkeeping worth the cost for a law firm or professional services practice?
For a firm with compliance-specific accounting requirements and a previous bad experience with a generalist bookkeeper, outsourced bookkeeping is worth the cost if the firm you hire has the credentials and the communication standards to do the job correctly. Price is not the deciding variable. The credential level of the team, the specificity of their industry experience, and their communication structure are. A team that includes credentialed accountants and operates with a defined monthly review process, such as Accountally’s Royal Revenue System, will catch problems before they reach a partner meeting. A generalist solo bookkeeper will not.
If your firm is managing trust accounts, multi-state payroll, and partner distributions without confidence that someone credentialed is reviewing the work before it goes out, schedule a free consultation. We will tell you exactly where your books stand, what scope makes sense for a firm like yours, and what it costs.
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