Chimney Sweep Service Break-Even: About $208K Monthly Revenue

Fixed costs $14.6K/mo Year 1 base

Contribution margin 75% After variable costs

Break-even revenue $19.4K/mo Monthly target

Break-even timing Month 22 Payback point

Break-even calculator

Test monthly revenue, direct costs, and fixed overhead to see where this service breaks even.

Lean Base Full

Monthly revenue Higher revenue leaves more room to cover fixed costs. $ Lower sales Higher sales Variable expenses These costs rise with each job, such as supplies, fuel, and ads. $ Lower direct cost Higher direct cost

Money available to cover fixed costs $35,000 $45,000 revenue - $10,000 variable expenses

Margin ratio

78%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base revenue must cover. $ Lean overhead Higher overhead

Break-even chart Revenue Total costs

Which chimney sweep expenses are fixed, and which move with sales?

Cost classification

Break-even only works if fixed overhead and job-linked costs are separated cleanly. For this model, monthly rent and insurance stay fixed, while materials, fuel, and ad spend move with revenue or customer volume.

Expense	Cost	Break-Even Treatment	Common Mistake
Office/Storage Rent	Fixed	Include $1,500 per month in fixed overhead for the relevant planning range.	Spreading rent across jobs and hiding the true monthly hurdle.
Business Insurance	Fixed	Include $300 per month as fixed overhead before contribution margin.	Modeling insurance as a percentage of each chimney job.
Software Subscriptions (CRM, Scheduling)	Fixed	Include $150 per month as a stable operating platform expense.	Ignoring small subscriptions that add up in break-even math.
Vehicle Insurance & Registration	Fixed	Include $400 per month as fixed overhead, separate from vehicle fuel.	Treating van purchases as monthly overhead instead of excluding capital spend.
Cleaning Supplies & Materials	Variable	Apply 8.0% of first-year revenue as job-linked direct expense.	Using a flat monthly amount even when job volume changes.
Specialized Equipment Consumables	Variable	Apply 5.0% of first-year revenue as usage-based operating expense.	Grouping consumables with one-time equipment purchases.
Vehicle Fuel & Maintenance	Variable	Apply 7.0% of first-year revenue because route volume drives usage.	Classifying all vehicle expense as fixed just because the van exists.
Certified Chimney Technician Labor	Semi-fixed	Add salary in staffing steps, starting at $50,000 for 1.0 FTE in the first year.	Assuming technician payroll rises smoothly with every new booking.

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

Scenario table

Break-even rises as staffing, overhead, and route coverage scale up. The lean setup clears fixed costs at a much lower revenue level, while the full setup needs far more monthly volume to stay even.

These are planning assumptions for comparison, not guarantees of actual break-even.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean owner-operator setup	$129k	$32k	$97k	75%	$0	Low overhead keeps break-even reachable with tight route density.
Base one-truck team	$208k	$52k	$156k	75%	$0	Needs roughly 70 jobs a month at $295 weighted revenue to clear fixed costs.
Full multi-tech buildout	$422k	$93k	$329k	78%	$0	Higher payroll means break-even depends on denser routes and stronger add-on repair sales.

What breaks the break-even plan for a chimney sweep service?

Stress test

The plan has little room for misses: base break-even is about $208k, so slower fall bookings, fuel spikes, and route inefficiency can push it off target fast. A 15% revenue drop or higher fixed costs turns that into a real cash gap.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$208k	$0 gap	No cushion for delay.
Revenue shortfall	Revenue comes in 15% below plan.	$208k	$23k gap	Weak fall bookings widen the gap.
Fixed-cost pressure	Fixed overhead rises 10%.	$228k	$20k gap	Insurance and admin costs add pressure.
Margin pressure	Variable expenses rise from 25% to 30%.	$222k	$14k gap	Fuel spikes and rework erode margin.
Combined pressure	Revenue is 15% lower, fixed costs are 10% higher, and variable expenses rise to 30%.	$256k	$48k gap	Slow bookings and route waste can blow past break-even.

What should you verify before buying a second service van?

Founder checklist

Before you buy Service Van 2, prove the first route can carry the Year 1 cost base and still stay busy. If weighted revenue slips far below about $295 per customer, break-even gets thin fast.

1Route density$40K van

Verify enough nearby jobs to keep the first route full before you spend $40,000 on Service Van 2, because weak density raises miles, fuel, and idle time.

2Fixed load$14.6K/mo

Verify the Year 1 fixed stack can be covered each month from rent, insurance, software, vehicle costs, utilities, and payroll, so break-even is not built on a thin base.

3Unit margin75% CM

Verify the mix of Cleaning & Inspection at $120 per hour, Repair Services at $150, Maintenance Package at $100, and Emergency Service at $200 still clears the 13% COGS load and 12% variable spend.

4Staffing ramp2.5 FTE

Verify the first-year team can handle cleaning, inspection, repair, and emergency work before you add another technician, because labor has to match route volume, not guesswork.

5Cash cushion$618K

Verify seasonal cash stays well ahead of the model’s $618,000 minimum cash point in Month 32, so slow booking months do not force a bad hire or vehicle buy.

6Launch setupMonth 4

Verify insurance, vehicle registration, scheduling software, safety gear, ladders, the inspection camera, booking flow, and review process are live by Month 4, because setup gaps delay revenue.