Suspension Repair Shop Break-Even Analysis: $45K/Month Target

Fixed costs $31.8K Salaries plus overhead

Contribution margin 74.5% After variable costs

Break-even revenue $42.6K Monthly target

Break-even timing Month 5 Model break-even

Break-even calculator

Use this calculator to test monthly revenue, variable expenses, and fixed shop costs against break-even.

Lean Base Full

Monthly revenue Revenue funds the margin that pays fixed shop costs. $ Low sales High sales Variable expenses These are direct costs that rise with each repair job. $ Low costs High costs

Money available to cover fixed costs $71,395 $95,833 revenue - $24,438 variable expenses

Margin ratio

74%

Covers fixed costs

Yes

Fixed monthly costs These monthly costs stay on the clock even when bays are slow. $ Low overhead High overhead

Break-even chart Revenue Total costs

Which suspension repair shop expenses are fixed, and which move with sales?

Cost classification

Break-even is reliable only when overhead stays separate from job-level repair costs. Here’s the quick math logic: fixed bills set the monthly hurdle, while parts, fees, and bay-use items move with revenue or volume.

Expense	Cost	Break-Even Treatment	Common Mistake
Workshop Rent	Fixed	Include $6,500 per month in the fixed overhead base from Month 1 through Month 60.	Spreading rent across each repair job instead of treating it as a monthly hurdle.
Liability and Garage Insurance	Fixed	Include $850 per month as fixed overhead for the planning range.	Reducing insurance when early-month sales are soft, even though the bill stays due.
Software and Diagnostic Subs	Fixed	Include $450 per month as recurring overhead needed to run diagnostics and shop workflow.	Linking subscriptions to job count when the model shows a steady monthly amount.
OEM and Aftermarket Parts	Variable	Treat as job-level expense at 18.0% of revenue in the first year, falling to 16.0% by the fifth year.	Putting parts in overhead, which overstates margin on each repair order.
Shop Consumables and Fluids	Variable	Treat as revenue-linked expense at 3.0% in the first year, falling to 2.2% by the fifth year.	Ignoring small usage items because each ticket looks minor.
Waste Disposal and Environmental Fees	Variable	Treat as volume-linked expense at 2.0% of revenue in the first year, falling to 1.2% by the fifth year.	Booking disposal as fixed even though more jobs create more waste handling.
Utilities and Internet	Semi-variable	Start with the $1,200 monthly base, then stress-test increases as bay use and equipment runtime rise.	Leaving utilities flat at full capacity when lifts, compressors, and diagnostic tools run longer.
Technician Payroll	Semi-fixed	Model salaried technician headcount in steps as staffing rises from Year 1 to later years.	Treating all technician pay as job-level variable when Year 1 staffing is salaried.

How does break-even move from a lean suspension shop to a base and full build?

Scenario table

Lean setup sits well below break-even because fixed overhead is heavy versus sales. The base and full cases improve the cushion, but break-even still depends more on monthly volume than on small margin gains.

Planning assumptions only; scenario figures are not a profit guarantee.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean suspension shop	$95.8k	$24.4k	$339k	74.5%	-$267.6k	Far below break-even; overhead is the main risk.
Base suspension shop	$176.2k	$43.3k	$440k	75.4%	-$307.2k	Still below break-even, but sales are moving the right way.
Full suspension shop	$392.6k	$85.9k	$636k	78.1%	-$329.3k	Best cushion here, yet monthly revenue still misses break-even.

What breaks the break-even plan for this suspension repair shop?

Stress test

Year 1 revenue is about $1.15M, and break-even lands near $512k, so there is room. The risk is a mix of weaker bookings, a 10% fixed-cost bump, or parts and fee pressure that pushes break-even into the $550k-$603k range.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change from the Year 1 plan.	$512k	$638k cushion	The base plan clears break-even with room to spare.
Revenue shortfall	Year 1 revenue drops 20% to about $920k.	$512k	$408k cushion	Still above break-even, but the cushion shrinks fast.
Fixed-cost pressure	Fixed costs rise 10% to about $419k a year.	$563k	$587k cushion	Higher overhead means the shop needs more booked work.
Margin pressure	Variable expenses rise from 25.5% to 30.5% of revenue.	$549k	$601k cushion	Parts and fee pressure raise the break-even bar.
Combined pressure	Fixed costs rise 10% and variable expenses rise to 30.5%.	$603k	$547k cushion	At about $50k a month, a $45k month leaves a small gap.

Can you prove the shop will break even before you sign the lease?

Founder checklist

Treat the lease as a hard gate. If you cannot show Month 5 break-even demand against $10.1K of monthly shop overhead and $260K of Year 1 payroll, don’t commit yet.

1Demand ProofMonth 5

Verify appointment flow can reach break-even in Month 5, because Year 1 revenue is $1.15M, or about $95.8K a month on average.

2Shop Overhead$10.1K/mo

Check that rent, utilities, insurance, equipment maintenance, software, and janitorial stay at $10.1K a month, because that fixed load sets the floor before one repair is sold.

3Payroll Load$260K/yr

Confirm Year 1 staffing can run at $260K a year across the manager, lead tech, junior tech, and advisor, or labor will eat the margin needed for break-even.

4Equipment Fund$135K

Verify the $135K equipment stack is funded before opening, because alignment gear, lifts, scanners, the air-suspension bench, hydraulic presses, furniture, and IT are launch-critical.

5Cash CushionM2 $777K

Hold at least $777K of cash through Month 2, since that is the model’s minimum cash point and it protects you while revenue ramps and capex lands.

6Launch Load25.5%

Confirm parts supply and card fee terms before day one, since Year 1 parts, consumables, waste, and processing total 25.5% of sales and can squeeze contribution fast.