Sewer and Drainage Break-Even Analysis: $996K Monthly Target

Fixed costs $68.2K/mo Payroll and overhead

Contribution margin 76% After variable costs

Break-even revenue $90.3K/mo Cover all costs

Break-even timing Month 29 Model crossover

Break-even calculator

Use this calculator to test monthly revenue against variable expenses and fixed monthly costs for a sewer and drainage service.

Lean Base Full

Monthly revenue Revenue is the pool that covers variable costs and then fixed costs. $ Lower sales Higher sales Variable expenses These rise with each job and with revenue-linked marketing. $ Lower costs Higher costs

Money available to cover fixed costs $67,950 $90,000 revenue - $22,050 variable expenses

Margin ratio

76%

Covers fixed costs

$200 short

Fixed monthly costs This is the monthly cost base the margin must cover. $ Lower overhead Higher overhead

Break-even chart Revenue Total costs

Which sewer and drainage expenses are fixed, and which move with sales?

Cost classification

Break-even lands in Month 29 only if each expense is classified cleanly. Treating payroll, trucks, and leases as fully variable can make the model look safer than the cash reality.

Expense	Cost	Break-Even Treatment	Common Mistake
Office Rent	Fixed	Include $3,500 per month in fixed overhead before calculating the revenue needed to break even.	Tying rent to job volume when the lease stays due in slow months.
Insurance Liability and Workers Comp	Fixed	Include $1,200 per month as recurring overhead for the monthly break-even base.	Leaving insurance out because it is not tied to a specific service call.
Materials and Parts	Variable	Deduct as a revenue-linked charge, starting at 6.0% in the first year and falling to 4.5% by the fifth year.	Using a flat monthly parts budget instead of scaling it with completed jobs.
Performance Marketing	Variable	Deduct from contribution margin as ads tied to revenue, starting at 8.0% in the first year.	Double counting it with the annual marketing budget instead of separating revenue-tied spend.
Consumables and Fuel	Variable	Apply as job-volume usage, starting at 2.0% of revenue in the first year.	Treating fuel as fixed when more routes and callouts raise usage.
Technicians	Semi-fixed	Add payroll in crew steps: 6.0 FTEs in the first year, rising to 14.0 FTEs by the fifth year.	Treating every labor dollar as variable when payroll stays due in a slow month.
Dispatcher / Scheduler	Semi-fixed	Model staffing in steps from 1.0 FTE in the first year to 2.0 FTEs in later years.	Holding scheduling flat even as service volume creates a real staffing step-up.

How do lean, base, and full operations change break-even for sewer and drainage work?

Scenario table

As call volume rises and installation work takes a bigger share, revenue grows faster than fixed staffing and vehicle costs. Lower CAC also helps, so the business moves from a lean loss to a base-case profit and then a fuller cushion.

Planning assumptions only; actual results will move with job mix, field costs, and demand.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean Year 1 profile	$532k	$131k	$752k	75.4%	-$351k	Still below break-even; more call volume is needed.
Base Year 3 profile	$1.51m	$307k	$1.10m	79.6%	$103k	Near break-even coverage; a small mix lift can hold profit.
Full Year 5 profile	$2.68m	$415k	$1.41m	84.5%	$858k	Clear cushion; stronger installs cover the fixed base.

What breaks the break-even plan for this service business?

Stress test

This plan has a cushion, but not a wide one. Slower calls, higher fuel, more warranty work, and weak dispatch density can push it below break-even fast.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$1,378k	$130k cushion	Base case stays above break-even.
Revenue shortfall	Revenue falls 10% from the Year 3 plan.	$1,378k	$20k gap	Sales softness flips monthly profit to about a $16k loss.
Fixed-cost increase	Fixed costs rise 10% from the Year 3 plan.	$1,516k	$8k gap	Overhead creep wipes out the cushion and turns profit negative.
Margin pressure	Contribution margin drops 5 points from the Year 3 plan.	$1,470k	$39k cushion	Fuel, warranty, or dispatch drag leaves only a thin buffer.
Combined pressure	Revenue falls 10%, fixed costs rise 10%, and margin drops 5 points.	$1,618k	$261k gap	Small misses stack fast and drive about a $194k monthly loss.

Can you prove enough call volume and route density before you lock in the vans and crew?

Founder checklist

Don’t lock in leases, vans, or a full crew until call volume, install demand, CAC, and cash all support the Month 29 break-even path. This model carries about $68.2k a month in fixed costs and about $223.5k of capex before it gets traction.

1Emergency Calls$199 fee

Verify enough emergency call volume at a $199 callout fee, because weak urgent demand leaves crews idle and slows break-even.

2Install Pipeline$35k/mo

Check that installation demand can reach about a $35k monthly run-rate, since each project averages $3,500 and the schedule has to fill beyond quick fixes.

3CAC Test$240 CAC

Test whether a $240 customer acquisition cost still leaves room to book profitable jobs, because Year 1 marketing spend is $85,000.

4Margin Check75.5% CM

Confirm Year 1 contribution margin holds near 75.5% after 12% COGS and 12.5% variable spend, or the fixed load will not clear.

5Dispatcher Load6 techs

Make sure dispatch can keep six technicians busy before you add more, because route density has to beat drive time or labor gets wasted.

6Cash Buffer$111k / M29

Hold at least $111k of cash and do not add territory until the Month 29 break-even path is credible, because upfront capex totals about $223.5k.