Retaining Wall Break-Even Analysis: $50K Monthly Break-Even Point

Fixed costs $9.5K/mo Overhead per month

Contribution margin 66.5% After variable costs

Break-even revenue $14.2K/mo Revenue to cover costs

Break-even timing Month 3 First profitable month

Break-even calculator

Test monthly revenue, variable expenses, and fixed costs against break-even for a retaining wall design and construction firm.

Lean Base Full

Monthly revenue Monthly sales that fund overhead after direct costs. $ Slow month Strong month Variable expenses Direct project costs that rise with each job, like materials, labor, fuel, and permits. $ Thin costs Heavy costs

Money available to cover fixed costs $426,108 $614,917 revenue - $188,809 variable expenses

Margin ratio

69%

Covers fixed costs

Yes

Fixed monthly costs Monthly overhead the business must cover before profit starts. $ Lean overhead Big overhead

Break-even chart Revenue Total costs

Which retaining wall business expenses are fixed, and which move with sales?

Cost classification

Break-even is reliable only when fixed overhead stays separate from job-level spend. In the first year, $9,450/month of listed fixed overhead is covered before materials, labor, fuel, and permit fees reduce margin.

Expense	Cost	Break-Even Treatment	Common Mistake
Equipment Storage Yard Rent	Fixed	Use $3,500/month as overhead from Month 1 through Month 60.	Spreading yard rent across each wall job and hiding true overhead.
General Liability Insurance	Fixed	Use $1,200/month as recurring overhead in the monthly break-even base.	Treating insurance as optional until larger jobs start.
Professional CAD Software Subscription	Fixed	Use $450/month as design overhead, not a per-project charge.	Assigning the full subscription to the first design job each month.
Raw Materials and Stone Supply	Variable	Apply 18.0% of first-year revenue, falling to 16.0% by the mature year.	Treating drainage fixes and stone overruns as overhead instead of margin pressure.
Direct Project Labor Wages	Variable	Apply 10.0% of first-year revenue, falling to 8.0% by the mature year.	Leaving rework hours out of job-level labor margin.
Equipment Fuel and Maintenance	Variable	Apply 3.0% of first-year revenue, falling to 2.2% by the mature year.	Missing access delays that increase machine time and fuel use.
Permitting and Site Survey Fees	Variable	Apply 2.5% of first-year revenue, falling to 1.8% by the mature year.	Putting permit and survey work in overhead instead of job estimates.
Project Supervisor Salary	Semi-fixed	Model $68,000 per full-time role, stepping from 1.0 FTE to 2.0 FTE in Year 3.	Assuming supervision scales smoothly with revenue instead of in staffing steps.

How does break-even shift across lean, base, and full retaining wall scenarios?

Scenario table

Break-even moves up as the model adds overhead and capacity. The lean case is the safest cash test, the base case sits closest to the line, and the full case only works if higher billable volume arrives before fixed costs do.

Planning-case figures use model-year assumptions, so treat them as direction, not a guarantee.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean retaining wall build-out	$168k	$56.3k	$334k	66.5%	-$222k	High risk; overhead outruns revenue here.
Base slope stabilization mix	$615k	$188.8k	$466k	69.3%	-$40k	Near break-even; small misses can flip profit to loss.
Full service crew build-out	$1.16M	$325k	$509k	72.0%	$328k	Clear cushion, but only if signed work is already in place.

What breaks the break-even plan for retaining wall work?

Stress test

Base year revenue of $2.016M sits far above the ~$502K break-even line, so the plan starts with a wide cushion. The real risk is margin loss from drainage rework, tight access, slow permits, subcontractor overruns, and underpriced engineered walls.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$502K	$1,514K cushion	Healthy cushion, but protect margin on complex sites.
Revenue shortfall	Annual revenue falls 20% to $1.344M.	$502K	$842K cushion	Still above break-even, but the buffer thins.
Fixed-cost pressure	Fixed costs rise 15%.	$577K	$1,439K cushion	Overhead creep raises the break-even bar.
Margin pressure	Variable expenses rise 5 points to 38.5% of revenue.	$543K	$1,473K cushion	Rework and access issues can squeeze margin.
Combined pressure	Revenue drops 20%, fixed costs rise 15%, and variable expenses rise 5 points.	$625K	$719K cushion	Multiple hits still leave a cushion, but less room for error.

What should you verify before you lease the yard and lock in overhead?

Founder checklist

Don’t lock in the yard, crew, and equipment until signed work, margin, and cash all line up. This model reaches break-even by Month 3, so the first commitment has to fit the real pipeline, not hope.

1Signed pipeline$502K target

Verify booked work can carry the break-even target before you lease the yard, because fixed overhead starts on day one.

2Fixed load$400.9K/yr

Add Year 1 wages, fixed overhead, and the $15K marketing budget so you know the monthly burn you must cover.

3Margin check66.5% CM

Lock supplier quotes for stone, block, drainage, and geogrid before you price jobs, since Year 1 variable costs run 33.5% of revenue.

4Crew ramp5 jobs/mo

Test whether the crew and hires can handle five blended project equivalents a month without pushing starts or hurting job quality.

5Cash cushion$776K

Check Month 2 cash needs against the minimum cash point so equipment buys and payroll do not outrun the bank balance.

6Launch demand33 customers

Make sure a $15K Year 1 marketing budget can support a $450 CAC, which only buys about 33 new customers.