Custom Car Shop Break-Even Analysis: $805K Monthly Revenue Target

Fixed costs $63.8K/mo Rent + payroll

Contribution margin 79.2% After variable costs

Break-even revenue $80.6K/mo Monthly target

Break-even timing Month 1 Launch month

Break-even calculator

Test whether monthly shop revenue covers parts, labor, and overhead.

Lean Base Full

Monthly revenue Revenue sets the cash available to cover fixed overhead. $ Lower sales Higher sales Variable expenses Use direct parts, labor, and job costs that rise with each build. $ Lower direct Higher direct

Money available to cover fixed costs $285,651 $322,417 revenue - $36,766 variable expenses

Margin ratio

89%

Covers fixed costs

Yes

Fixed monthly costs These are the monthly overhead costs the shop has to cover before profit starts. $ Lower overhead Higher overhead

Break-even chart Revenue Total costs

Which custom car shop expenses are fixed, variable, semi-variable, or semi-fixed for break-even?

Cost classification

Break-even only works if each expense behaves the right way in the model. Rent stays flat, job materials move with builds, and salaried capacity changes in steps as the shop adds people.

Expense	Cost	Break-Even Treatment	Common Mistake
Workshop & Showroom Rent	Fixed	Use $15,000 per month as base overhead from Month 1 through Month 60.	Spreading rent across jobs and understating slow-month risk.
Utilities	Semi-variable	Start with $2,500 per month, then stress-test higher usage as booth, dyno, and fabrication load rises.	Modeling utilities as flat while production volume grows.
Business Insurance	Fixed	Use $1,000 per month as recurring overhead within the planning range.	Tying insurance directly to each vehicle build.
Salaried Shop Payroll	Semi-fixed	Use first-year wages of $490,000 annually, or about $40,833 per month, then step up when added full-time equivalents are planned.	Treating all technician pay as variable job labor.
Direct Labor Inside Job Inputs	Variable	Apply per job, such as $400 for each Body Kit Install and $2,500 for each Full Signature build.	Burying job labor in overhead and overstating margin.
Build Materials	Variable	Apply per job, such as $600 Premium Paint Materials and $1,000 Upholstery Materials.	Ignoring materials waste, trim, finish, and consumables.
Sales Commissions	Variable	Use 5.0% of first-year revenue, declining to 3.0% by the fifth year.	Entering commissions as fixed payroll instead of sales-linked spend.
Marketing & Advertising	Variable	Use 4.0% of first-year revenue, declining to 2.0% by the fifth year.	Keeping marketing flat while revenue depends on booked jobs.

How does break-even change across lean, base, and full shop setups?

Scenario table

Break-even moves mostly with fixed payroll and shop overhead. Lean mode can break even around $805K a month, the base launch plan sits above break-even, and the full buildout needs about $1.07M monthly to cover the heavier cost base.

Planning assumptions only; results will change with job mix, parts costs, and staffing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean custom shop	$805K	$167K	$638K	79.3%	$0	Breaks even only if volume stays near this level.
Base launch plan	$152K	$32K	$64K	79.1%	$56K	Launch case stays above break-even with room to absorb swings.
Full buildout plan	$480K	$74K	$905K	84.6%	-$499K	Not enough volume yet; fixed cost load is too heavy.

What would break the break-even cushion for this custom car shop?

Stress test

At $1.521M monthly revenue versus $805K break-even, the plan has about $715K of cushion. That cushion shrinks fast if completed jobs slow, rework rises, or rent and shop overhead keep climbing.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$805K	$715K cushion	The base plan clears fixed costs with room left.
Revenue shortfall	Monthly revenue falls 47% from the base plan.	$805K	$1K cushion	A sharp drop in completed projects nearly uses up the cushion.
Fixed-cost pressure	Monthly fixed overhead rises by $567K.	$1.52M	$0 cushion	Higher rent, payroll, or shop overhead wipes out the operating buffer.
Margin pressure	Contribution margin falls to 42.0%.	$1.52M	$2K cushion	More rework, waste, or overtime pushes the shop to the edge.
Combined pressure	Monthly revenue falls 20%, fixed overhead rises by $567K, and contribution margin falls to 42.0%.	$2.87M	$1.35M gap	Lost jobs, lower margin, and higher overhead blow past the cushion.

What must you verify before you sign the lease for a custom car shop?

Founder checklist

The model shows breakeven in Month 1, but cash dips to $945K in Month 2, so the lease only works if signed demand, staffing, and equipment timing are real. Do not commit until the Year 1 job mix and deposits are already in hand.

1Signed Demand$1.825M/yr

Get signed jobs and deposits that match the Year 1 mix of 30 body kits, 25 engine tunes, 15 interiors, 5 full builds, and 20 paint jobs before the lease, because that is the volume behind the plan.

2Fixed Burn$23K/mo

Check that rent, utilities, insurance, security, software, office, professional help, and R&D sit inside the slow-month cash plan before wages start to hit.

3Margin Mix79.1% CM

Here’s the quick math: Year 1 revenue is $1.825M and variable costs are about $382K, so the mix has room, but more Full Signature work will tighten break-even.

4Staffing Ramp$490K payroll

Confirm booked work can carry 5.5 FTE, because Year 1 salaried labor totals $490K and the apprentice starts in Month 13.

5Equipment Gate$545K capex

Hold off on the full equipment package until the workflow proves the paint booth, dyno, lifts, and fabrication tools will stay busy, and lock supplier terms for body kits, upholstery, paint, and performance parts.

6Cash Cushion$945K min

Protect the Month 2 cash floor and do not sign the lease unless deposits, labor, and job flow can cover the ramp without a funding gap.