Bank Drive-Thru Construction Break-Even: About $131K/Month

Fixed costs $22.2K Monthly overhead base

Contribution margin 71% After variable costs

Break-even revenue $31.2K Monthly revenue target

Break-even timing Month 8 Model break point

Break-even calculator

Use this to test monthly break-even for bank drive-thru construction.

Lean Base Full

Monthly revenue More monthly revenue gives you more room to cover fixed costs. $ Low volume High volume Variable expenses These are direct costs that move with each project, like travel and sales commissions. $ Tight costs Higher costs

Money available to cover fixed costs $89,224 $125,667 revenue - $36,443 variable expenses

Margin ratio

71%

Covers fixed costs

$4,083 short

Fixed monthly costs This is the monthly overhead the business has to cover either way. $ Lean overhead Heavier overhead

Break-even chart Revenue Total costs

Which expenses are fixed and which move with sales in bank drive-thru construction?

Cost classification

Break-even works only if fixed overhead stays separate from project-driven spend. In the first year, $22,150/month of listed fixed overhead should not be mixed with revenue-based costs like subcontractor labor, materials, travel, and commissions.

Expense	Cost	Break-Even Treatment	Common Mistake
Design Office Rent	Fixed	$12,500/month overhead.	Treating it as project-specific.
Professional Liability Insurance	Fixed	$3,200/month overhead.	Leaving it out of break-even.
CAD & BIM Software Subscriptions	Fixed	$1,800/month overhead.	Scaling it with revenue.
Marketing Tools & CRM	Fixed	$1,200/month overhead.	Double-counting with the marketing budget.
Subcontractor Labor Pass-Through	Variable	12% of first-year revenue.	Treating pass-through as profit.
Specialized Material Procurement	Variable	8% of first-year revenue.	Missing the margin drag.
Project Site Travel & Logistics	Variable	5% of first-year revenue.	Ignoring site distance.
Senior Project Manager Payroll	Semi-fixed	Steps up as headcount grows.	Hiring ahead of backlog.

How does break-even shift from a lean ramp to a full project pipeline for bank drive-thru construction?

Scenario table

Lean months stay close to the line because fixed overhead is heavy while revenue is still building. By the full pipeline year, higher margin and volume create a much wider cushion, but the allocation mix should be checked because the listed percentages do not sum to 100%.

Planning assumptions only; scenario figures are guides, not guarantees, and the mix percentages should be checked before use.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean ramp year 1	$126k	$37k	$93k	71%	$-4k	Still below the $131k/month break-even point, so a small backlog miss turns into losses.
Base scale year 2	$258k	$71k	$111k	72.5%	$76k	Near the $153k/month break-even point, so a little more pipeline creates cushion.
Full pipeline year 5	$653k	$150k	$240k	77%	$263k	Well above the $312k/month break-even point, so the mix has room if project timing holds.

What breaks this bank drive-thru construction plan before it reaches break-even?

Stress test

Year 1 revenue is only about $126k a month against a $131k break-even line, so the opening cushion is thin. A $10k overhead bump or a 1-point margin drop can wipe it out and push the model back into loss.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	Year 1 revenue holds near $126,000 per month.	$131,000	$5,000 gap	Thin cushion; timing noise can erase it.
Revenue shortfall	Year 1 revenue slips to $120,000 per month.	$131,000	$11,000 gap	Slow starts and billing delays widen the opening loss.
Fixed-cost increase	Overhead rises by $10,000 per month.	$145,000	$19,000 gap	Extra payroll or rent pushes break-even much higher.
Margin pressure	Contribution margin falls 1 point from 71% to 70%.	$133,000	$7,000 gap	Unbilled pass-through costs and rework eat the cushion.
Combined pressure	Starts slip, subcontractor costs run higher, and hires land before backlog.	$149,000	$23,000 gap	Year 1 EBITDA loss of $49k can widen fast.

Is the backlog, cash, and staffing ready before you lock in bank drive-thru construction spend?

Founder checklist

Don’t lock the office, payroll, or vehicles until you have signed or high-confidence backlog near $131K a month and enough cash to get through Month 8. The model needs a $421K minimum cash buffer and $329K of capex before break-even feels real.

1Backlog$131K/mo

Confirm signed or high-confidence project backlog at the break-even run rate before you commit to more fixed overhead.

2Fixed Burn$22.2K/mo

Keep the $12.5K office rent, $3.2K insurance, and other fixed costs inside one clean monthly base so job pricing does not hide overhead.

3Margin Floor71% CM

Verify subcontractor and material pricing before any fixed-fee bid, because Year 1 variable costs take 29% of revenue and margin slips fast.

4PM Ramp1.0 FTE

Do not add Senior Project Managers ahead of active work; the model starts at 1.0 FTE and should only rise as backlog turns real.

5Cash Buffer$421K min

Hold this reserve through Month 8, because the listed capex totals $329K and the buildout can outrun collections before breakeven.

6Launch CAC$120K / $15K CAC

Keep Year 1 marketing at $120K only if billing milestones and the $15K CAC keep new work flowing fast enough to feed the monthly hurdle.