Accounting Firm Break-Even Analysis: About $47K/Month to Cover Overhead

Fixed costs $8.25K/mo Office overhead

Contribution margin 74.5% After variable costs

Break-even revenue $11.1K/mo Monthly target

Break-even timing Month 9 Model break-even

Break-even calculator

Use this to see how monthly revenue, variable expenses, and fixed costs set the break-even point for an accounting firm.

Lean Base Full

Monthly revenue Revenue sets the pool that can cover direct costs and fixed overhead. $ Slow month Busy month Variable expenses These rise with sales and eat into the cash left for fixed costs. $ Light spend Heavy spend

Money available to cover fixed costs $129,800 $163,200 revenue - $33,400 variable expenses

Margin ratio

80%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead break-even must cover. $ Thin overhead Large overhead

Break-even chart Revenue Total costs

Which accounting firm expenses stay fixed, and which move with sales?

Cost classification

Your Month 9 break-even only holds if fixed overhead, revenue-linked fees, and hiring steps are classified correctly. Treating committed expenses as flexible can make the firm look profitable before cash actually catches up.

Expense	Cost	Break-Even Treatment	Common Mistake
Office Rent	Fixed	Include $4,500 per month from Month 1 through Month 60.	Reducing rent when revenue misses plan.
Professional Liability Insurance	Fixed	Include $1,200 per month as committed operating overhead.	Treating required coverage as optional during slow months.
Third-Party Software Licenses	Variable	Model at 8.0% of first-year revenue, falling to 6.0% by year five.	Forgetting usage fees that rise with client volume.
Marketing & Client Acquisition	Variable	Use 12.0% of first-year revenue, checked against the $48,000 first-year marketing budget.	Counting leads without funding the acquisition spend.
Client Communication & Portal Costs	Variable	Model at 2.5% of first-year revenue, then lower as scale improves.	Assuming client portal usage stays flat as accounts grow.
Utilities & Internet	Fixed	Include $350 per month within the normal office planning range.	Linking basic connectivity to billable hours.
Cloud Hosting & IT Services	Fixed	Include $600 per month as recurring operating infrastructure.	Dropping core systems from break-even overhead.
Staff Wages by Role and FTE	Semi-fixed	Model staffing in hiring steps as roles and full-time equivalents increase.	Treating staff as flexible when capacity is hired before revenue arrives.

How does break-even move from lean to base to full staffing for an accounting firm?

Scenario table

Higher staffing lifts fixed cost fast, but the revenue mix also improves margin. The lean, base, and full cases all need more monthly sales to break even, so signed recurring clients matter more than optimism.

Planning cases, not guarantees; actual break-even will shift with client mix, pricing, and staffing speed.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean Year 1 staffing	$47,000	$12,000	$35,000	74.5%	$0	Lowest overhead, but the cushion is thin.
Base Year 2 staffing	$67,100	$15,500	$51,600	76.9%	$0	This is the core case; steady clients are the key.
Full Year 5 staffing	$125,300	$20,700	$104,600	83.5%	$0	Higher margin helps, but the sales load is much heavier.

What breaks the break-even plan for this accounting firm?

Stress test

The base plan clears break-even at about $47,000 a month, but the cushion is thin. A 10% revenue miss, a 10% overhead jump, or margin pressure from heavier variable costs can each push the firm back fast.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change to Year 1 margin and overhead.	$47,000/mo	$0 gap	Base case has no cushion.
Revenue shortfall	Revenue runs 10% below plan.	$47,000/mo	$3,500 gap	Small sales misses quickly erase cash.
Fixed-cost pressure	Fixed overhead rises 10%.	$51,700/mo	$4,700 gap	Staff and rent creep push break-even up.
Margin pressure	Variable expenses rise from 25.5% to 30.5% of revenue.	$50,400/mo	$3,400 gap	Discounting tax work or overusing contractors hurts margin.
Combined pressure	Revenue falls 10%, fixed costs rise 10%, and variable expenses move to 30.5%.	$56,100/mo	$9,100 gap	Watch CAC above $800, slow onboarding, and hiring before recurring bookkeeping demand.

What should you verify before signing the lease or hiring more staff at this accounting firm?

Founder checklist

Don’t sign the lease or add staff until the recurring client pipeline can support about $47K a month and CAC stays near $800. The model reaches break-even in Month 9 and payback in Month 28, so early spend has to prove demand fast.

1Client Pipeline$47K/mo

Verify recurring clients can reach about $47K a month before you lock in rent or scale ad spend, because that is the demand base the model needs.

2Fixed Load$35K/mo

Keep monthly fixed costs near $35K before owner distributions, or the firm needs more sales just to stand still.

3Contribution Margin74.5% CM

Check that the service mix still leaves about 74.5% contribution margin after 11% COGS and 14.5% variable costs, because every point lost pushes break-even out.

4Capacity Ramp8.5 hrs/client

Match staffing to 8.5 average billable hours per active customer and delay extra hires until utilization shows up, so payroll does not outrun work.

5Cash Runway$685K min

Hold at least $685K of cash through Month 8, since that is the low point and it covers setup, hiring, and the slow client ramp.

6Break-even TimingMonth 9 / Month 28

Use Month 9 break-even and Month 28 payback as go-no go gates; if the plan misses either, hold off on the lease and extra marketing.