Construction Traffic Flagging Service Break-Even: $72K/Month

Fixed costs $48.4K/mo Overhead plus wages

Contribution margin 72.5% After variable costs

Break-even revenue $66.8K Monthly target

Break-even timing Month 4 Cash turns positive

Break-even calculator

Test monthly revenue against direct costs and fixed overhead to see where break-even lands.

Lean Base Full

Monthly revenue Revenue is the cash coming in each month before direct and fixed costs. $ Thin month Busy month Variable expenses Direct field costs that rise with more work, like fuel, gear, and dispatch fees. $ Light direct Heavy direct

Money available to cover fixed costs $386,458 $509,167 revenue - $122,709 variable expenses

Margin ratio

76%

Covers fixed costs

Yes

Fixed monthly costs Monthly overhead the margin has to cover, such as rent, payroll, and insurance. $ Lean overhead Higher overhead

Break-even chart Revenue Total costs

Which traffic flagging expenses are fixed, variable, semi-variable, or semi-fixed?

Cost classification

Break-even gets shaky when fixed overhead, job-linked costs, and growth spending are mixed together. In the first operating year, rent and core salaries belong in the fixed base, while gear, fuel, software, and CAC should move with volume.

Expense	Cost	Break-Even Treatment	Common Mistake
Operations Center Rent	Fixed	Include $6,500 per month in the fixed break-even base from Month 1 through Month 60.	Treating rent as job-driven and understating the monthly revenue floor.
General Liability Insurance	Fixed	Include $4,200 per month as required overhead before any job contribution covers profit.	Leaving insurance below the line because it does not touch each job ticket.
Telecommunications and Radio Subs	Fixed	Include $1,200 per month because dispatch communication capacity is in place whether crews are fully booked or slow.	Charging the full amount to each job and making low-volume work look unprofitable.
Professional Legal and Accounting	Fixed	Include $2,500 per month in fixed overhead for baseline compliance, contracts, accounting, and advisory support.	Excluding recurring professional fees as if they were only startup spending.
Salaried Management and Admin Wages	Semi-fixed	Use $385,000 per year in the first operating year, then step it up as forecast full-time equivalent staffing rises.	Modeling salaried roles as a percent of sales instead of capacity that changes in steps.
Field Personnel Protective Gear	Variable	Apply 8.5% of revenue in the first year, declining to 6.5% by the mature year as volume and purchasing efficiency improve.	Putting gear into fixed overhead and missing the margin drag from each added job.
Fleet Fuel and Maintenance	Variable	Apply 10.0% of revenue in the first year, falling to 8.0% by the mature year as routing and fleet use improve.	Using one flat monthly fuel number even when billable hours and site miles rise.
Marketing and Customer Acquisition	Semi-variable	Model the $45,000 first-year marketing budget with CAC at $1,500 because spend supports growth but acquisition volume drives the real load.	Treating marketing as pure fixed overhead and ignoring how new customer targets affect cash needs.

How does break-even change from a lean launch to a full traffic flagging operation?

Scenario table

Break-even moves with signed work, variable costs, and fixed payroll. More revenue helps, but each extra crew and support role raises the monthly base, so the contribution margin has to cover a bigger load.

These are planning assumptions, not guarantees; dispatch coverage and crew utilization can move the result.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch break-even case	$78.8k/mo	$21.7k/mo	$57.1k/mo	72.5%	$0/mo	Near break-even; a small drop in signed work turns profit negative.
Year 1 base case	$164.6k/mo	$45.2k/mo	$57.1k/mo	72.5%	$62.2k/mo	Clear of break-even, but crews still need steady utilization.
Mature-year full operating case	$961.0k/mo	$198.9k/mo	$95.5k/mo	79.3%	$666.7k/mo	Wide cushion, but the larger team has to stay busy.

What breaks the break-even plan for a traffic flagging service?

Stress test

The plan clears break-even with room, but the cushion shrinks fast if revenue slips or fixed overhead creeps up. The biggest risks are delayed contracts, idle crew time, overtime pressure, fuel spikes, and insurance increases.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change to revenue, margin, or overhead.	$72.0k	$92.6k cushion	Healthy cushion, but timing still matters.
Revenue shortfall	Monthly revenue falls 20% to $131.7k.	$72.0k	$59.7k cushion	Still above break-even, but the buffer drops fast.
Fixed-cost pressure	Fixed overhead rises 15% to $60.0k.	$82.8k	$81.8k cushion	Sticky rent, insurance, and admin costs raise the floor.
Margin pressure	Variable expenses rise 5 points, cutting contribution margin to 67.5%.	$77.3k	$87.3k cushion	Fuel, labor, and software drag push break-even higher.
Combined pressure	Revenue falls 20%, fixed overhead rises 15%, and margin drops 5 points.	$88.9k	$42.8k cushion	The business still clears break-even, but the cushion gets thin.

Is this traffic flagging service ready to clear break-even before you buy more trucks, space, or staff?

Founder checklist

Only move forward if you can line up enough work to clear about $72K a month, because Year 1 fixed load is about $52.2K and the model's contribution margin is 72.5%. Keep the $352.5K capex separate from operating break-even so the launch does not starve cash.

1Revenue Test$72K/mo

Verify signed or highly probable work can clear about $72K a month before you commit to more trucks or space.

2Fixed Load$52.2K/mo

Check that rent, insurance, telecom, admin, legal, support, wages, and marketing stay near this load, or break-even moves up fast.

3Margin Check72.5% CM

Confirm Year 1 rates of $45, $75, and $55 an hour leave about 72.5% after gear, safety fees, fuel, and dispatch.

4Hours Plan440 hrs

Make sure the launch schedule can cover 320 standard, 40 emergency, and 80 event hours without overtime or missed shifts.

5Cash Buffer$630K

Hold the modeled minimum cash through Month 4, and keep the $352.5K capex separate from operating break-even because trucks, signage, and setup hit before payback.

6CAC Gate$1.5K CAC

Verify each new customer still costs about $1,500 to win within the $45K Year 1 marketing budget, or lead flow will not support the ramp.