How Much Does an Accounting Firm Cost? Monthly and Annual Pricing#

Hiring an accounting firm is one of those expenses where cutting corners creates bigger problems than the savings justify. An IRS audit triggered by a filing error can cost $10,000-$50,000 in penalties and professional fees. Yet many business owners delay hiring a firm because they cannot get a straight answer on pricing.

This guide breaks down what accounting firms actually charge in 2026 across every common service, billing model, and business size.

Accounting Firm Pricing Models#

Accounting firms use three primary billing models. Understanding which one your firm uses -- and which one fits your needs -- is the first step to controlling costs.

| Billing Model | Typical Range | Best For | |---------------|---------------|----------| | Monthly retainer | $200-$2,000/mo | Ongoing bookkeeping + advisory | | Hourly rate | $150-$450/hr | Project-based or occasional needs | | Fixed fee per service | $300-$5,000/project | Tax returns, audits, specific filings | | Value pricing | % of savings or outcome | Tax planning, M&A advisory |

Most small businesses end up on a monthly retainer that bundles bookkeeping, tax preparation, and basic advisory. Hourly billing is more common for one-off projects like entity restructuring or audit representation.

Monthly Retainer Costs by Business Size#

Monthly retainers scale with transaction volume, entity complexity, and the services bundled in:

| Business Type | Monthly Retainer | What is Included | |---------------|-----------------|-----------------| | Sole proprietor / freelancer | $200-$400 | Bookkeeping, quarterly estimates, annual return | | Small business (under $500K revenue) | $300-$750 | Bookkeeping, payroll tax, annual returns, advisory | | Small business ($500K-$2M revenue) | $750-$1,500 | Full-service bookkeeping, monthly financials, tax planning | | Mid-market ($2M-$10M revenue) | $1,500-$3,500 | Controller-level services, cash flow forecasting, multi-state | | Mid-market ($10M+ revenue) | $3,500-$10,000+ | CFO-level advisory, audit prep, board reporting |

These retainers typically cover routine bookkeeping, financial statement preparation, and annual tax filing. Tax planning meetings, entity restructuring, and IRS representation are usually billed separately.

Hourly Rates by Role#

When firms bill hourly, rates depend heavily on who does the work:

| Role | Hourly Rate | Experience | |------|-------------|-----------| | Staff accountant | $75-$150 | 1-3 years | | Senior accountant | $150-$250 | 3-7 years | | Manager | $200-$350 | 7-12 years | | Partner / CPA | $300-$500 | 12+ years | | Specialized (forensic, international) | $400-$700 | Niche expertise |

A simple question that a staff accountant handles at $100/hour becomes a $400 bill if a partner picks up the phone instead. Ask your firm how work is delegated and which team members will handle your account day to day.

Per-Service Pricing#

Here is what individual services cost when priced separately:

Tax Preparation#

| Service | Price Range | Complexity Driver | |---------|-------------|-------------------| | Individual 1040 (simple) | $300-$500 | W-2 income, standard deduction | | Individual 1040 (complex) | $500-$1,500 | Investments, rental income, itemized deductions | | Partnership (1065) | $800-$2,500 | Number of partners, K-1 complexity | | S-Corp (1120S) | $1,000-$3,000 | Officer comp, multi-state filings | | C-Corp (1120) | $1,500-$5,000 | Revenue size, M&A activity, international | | Non-profit (990) | $750-$3,000 | Revenue size, program complexity | | State returns (each additional) | $100-$500 | State-specific requirements |

Bookkeeping#

| Service | Monthly Cost | Volume | |---------|-------------|--------| | Transaction categorization only | $200-$400 | Under 200 transactions | | Full bookkeeping + reconciliation | $400-$800 | 200-500 transactions | | Full bookkeeping + payroll | $600-$1,200 | 200-500 transactions + payroll | | Controller-level (financials + analysis) | $1,500-$3,500 | 500+ transactions + advisory |

Advisory and Planning#

| Service | Price Range | Frequency | |---------|-------------|-----------| | Tax planning session | $500-$2,000 | Annual or semi-annual | | Entity structuring | $1,000-$3,000 | One-time | | IRS audit representation | $2,000-$10,000 | Per audit | | Business valuation | $3,000-$15,000 | Per engagement | | Fractional CFO | $2,000-$8,000/mo | Ongoing |

CPA Firm vs Bookkeeper vs Online Service#

Not every business needs a full CPA firm. Here is how the options compare:

| Option | Monthly Cost | Best For | Limitations | |--------|-------------|----------|-------------| | DIY (QuickBooks/Xero) | $30-$100 | Tech-savvy solopreneurs | No tax advice, error-prone | | Online bookkeeping (Bench, Pilot) | $300-$600 | Small businesses wanting affordable bookkeeping | Limited advisory, cookie-cutter | | Local bookkeeper | $250-$500 | Simple businesses, low transaction volume | Cannot sign tax returns, no CPA guidance | | Regional CPA firm | $500-$2,000 | Growing businesses needing tax + advisory | Higher cost | | National firm (BDO, RSM) | $2,000-$10,000+ | Mid-market, multi-state, specialized industries | Enterprise pricing |

The sweet spot for most small businesses with $500K-$5M in revenue is a regional CPA firm on a monthly retainer. You get a dedicated accountant who knows your business, tax planning that pays for itself, and a CPA signature on your returns.

What Drives Accounting Costs Up#

Entity complexity. An S-Corp with multiple shareholders, officer compensation, and multi-state nexus costs 2-3x more than a single-member LLC.

Transaction volume. A business processing 1,000 transactions per month costs significantly more to maintain clean books than one processing 100.

Catch-up bookkeeping. If your books are months or years behind, expect to pay $500-$3,000 in catch-up fees before ongoing services begin.

Industry specialization. Accountants who specialize in construction, real estate, or healthcare charge 20-40% premiums, but their industry knowledge often saves more than the premium through better tax strategies.

Responsiveness expectations. Same-day email responses and unlimited phone access cost more. Some firms tier their service levels with premium access plans at higher retainer rates.

How to Reduce Your Accounting Costs#

1. Keep clean records. Use accounting software (QuickBooks, Xero) consistently. The less cleanup your accountant does, the less you pay.
2. Batch your questions. Instead of emailing your CPA weekly, compile questions for monthly check-ins.
3. Handle payroll separately. Payroll services like Gusto ($40 + $6/employee) are cheaper than having your CPA firm process payroll.
4. Negotiate fixed fees. Monthly retainers with defined scope protect you from hourly billing surprises.
5. Review your engagement letter annually. As your business changes, the scope of services should too. Do not pay for services you no longer need.

Frequently Asked Questions#

How much does a CPA charge for a small business tax return?#

A small business tax return (S-Corp 1120S or Partnership 1065) typically costs $1,000-$3,000 at a CPA firm. Simple returns for sole proprietors filing Schedule C cost $300-$800. Multi-state filers and businesses with complex transactions pay toward the higher end.

Is it worth paying for an accounting firm as a small business?#

For most businesses with over $200,000 in annual revenue, yes. A competent CPA typically saves more in tax optimization than they charge in fees. Beyond tax savings, accurate financials help you make better business decisions, secure financing, and avoid costly errors.

How much does a fractional CFO cost?#

A fractional CFO costs $2,000-$8,000 per month, depending on hours and scope. Most fractional CFOs work 5-15 hours per month. This is roughly one-quarter the cost of a full-time CFO ($200,000-$350,000 salary plus benefits) and makes senior financial leadership accessible to businesses with $2M-$20M in revenue.

Should I use an online bookkeeping service or a local CPA?#

Online bookkeeping services like Bench or Pilot ($300-$600/mo) are cost-effective for straightforward businesses. They handle transaction categorization and financial statements well. However, they do not provide tax planning, advisory, or the personalized guidance a local CPA offers. Many businesses use online bookkeeping for day-to-day records and a CPA for annual tax strategy -- the hybrid approach often delivers the best value.

When should I switch from doing my own books to hiring a firm?#

Switch when bookkeeping takes more than 5 hours per month, when you miss deadlines, or when your revenue exceeds $200,000. At that point, the opportunity cost of doing it yourself usually exceeds the cost of professional help. The tax planning benefits alone often cover the retainer.