Break-Even Analysis for a Service Business: How to Do It
The short answer: Break-even is the point where revenue exactly covers all your costs, so profit is zero. To find it, split costs into fixed (rent, insurance, salaries, software, that show up whether you work or not) and variable (labor and materials that scale with the work). Then break-even revenue = fixed costs ÷ contribution margin, where contribution margin is the share of each dollar left after variable costs. Below that number you lose money; above it, every dollar is mostly profit. CRMb shows the real cost and margin on each job from your crew's punched hours, which is exactly the input a trustworthy break-even needs.
Most owners can tell you roughly what a job costs. Far fewer can tell you how much work the whole business has to book, in a month, just to not lose money. That number is your break-even, and it is the difference between pricing with a plan and pricing with a hope.
This walks through separating your costs, finding your contribution margin, and turning both into a monthly break-even you can actually manage against.
Fixed vs variable costs: the split that everything rests on
Break-even math only works if you sort every cost into one of two buckets, so start there.
- Fixed costs stay roughly the same no matter how much work you do. Shop rent, general liability and vehicle insurance, office salaries, accounting software, your CRM, loan payments, phone plans. If you booked zero jobs next month, these bills still arrive.
- Variable costs move with the work. Crew wages tied to job hours, the materials a job consumes, subcontractor costs, fuel that scales with drive time. No jobs, and these fall toward zero.
The line is not always obvious. A salaried lead who runs jobs but also does office work is partly fixed, partly variable. A truck payment is fixed; the fuel it burns is variable. Sort each cost by asking one question: does this bill change when I book more or less work? If no, it is fixed. If yes, it is variable.
Get this split right and the rest is arithmetic. Get it wrong, especially by burying variable labor inside a "fixed" salary line, and your break-even will lie to you.
Step 1: Total your monthly fixed costs
Add up everything in the fixed bucket for a typical month. A small trades shop might land somewhere like this:
| Fixed cost | Monthly |
|---|---|
| Shop and yard rent | $2,200 |
| Insurance (liability + vehicles) | $1,400 |
| Office / admin salary | $3,800 |
| Software (CRM, accounting, phones) | $600 |
| Loan and equipment payments | $1,000 |
| Total fixed costs | $9,000 |
That $9,000 is the hole the business starts each month in. Every job's contribution has to fill it before a dollar of profit exists. This is also the number owners most often underestimate, because fixed costs are quiet, they do not show up on any one job, so they get left out of pricing entirely. Naming them is half the value of the exercise.
Step 2: Find your contribution margin
Contribution margin is what is left from a sale after its variable costs, the money that "contributes" to covering fixed costs and then profit.
Contribution margin ratio = (revenue − variable costs) ÷ revenue
Say a typical job bills $2,000 and its variable costs (crew labor at a loaded rate, plus materials) run $1,200. Contribution is 2,000 − 1,200 = $800, and the ratio is 800 ÷ 2,000 = 0.40, or 40%. Forty cents of every dollar you bill is available to cover overhead.
The single most useful version of this for a service business is contribution margin per billable hour, because hours are the thing you actually sell. If that same job took 20 crew-hours, it contributed $800 ÷ 20 = $40 per hour toward fixed costs and profit. Now break-even becomes a question of hours, which is how the work is really scheduled and sold.
The accuracy of this number lives and dies on the variable-cost side, and the biggest variable cost is labor. Estimated hours drift; punched hours do not. When contribution is built from what the crew actually worked, see how to calculate labor cost per job, the margin is real rather than optimistic.
Step 3: Calculate the break-even point
Now put the two together.
Break-even revenue = fixed costs ÷ contribution margin ratio
At $9,000 of fixed costs and a 40% contribution margin: 9,000 ÷ 0.40 = $22,500. The business has to book $22,500 of work in a month just to break even. Bill $22,500 and profit is zero; bill $30,000 and the extra $7,500 is 40% profit, $3,000 to the bottom line.
You can express the same thing in units that match how you sell:
- In jobs: if an average job bills $2,000, break-even is
22,500 ÷ 2,000 = 11.25, so about 12 jobs a month. - In billable hours: with $40 of contribution per hour, break-even is
9,000 ÷ 40 = 225 billable crew-hours a month. That is the number to schedule against.
The hours version is the one to pin to the wall. It converts an abstract revenue target into a concrete question every week: did we sell and deliver enough billable hours to stay ahead of overhead?
Step 4: Add a profit target
Break-even is survival, not the goal. To plan for a real profit, treat your target profit as if it were another fixed cost:
Revenue needed = (fixed costs + target profit) ÷ contribution margin ratio
Want $6,000 of monthly profit on top of that $9,000 overhead? (9,000 + 6,000) ÷ 0.40 = $37,500, or about 19 jobs, or 375 billable hours. Same math, one more term, and now you have a monthly booking target that includes the profit you actually want, not just the loss you are trying to avoid.
Why the inputs are the hard part
The formula is simple. The trap is that break-even is only as honest as its two inputs, and both are easy to get wrong:
- Fixed costs get undercounted. Software subscriptions, small insurance riders, and owner draws slip out of the list, so the real overhead hole is deeper than the number you calculated.
- Contribution margin gets inflated because variable labor is estimated instead of measured. A job you thought contributed 40% actually contributed 28% once the crew ran four hours long, and you never saw it.
This is where running the business on one connected system earns its keep. In CRMb, crew hours flow from the Punch app into each job's labor cost, materials come out of inventory at average cost, and reports show the real margin per job. That gives you a trustworthy contribution figure per job and per hour, the exact input the break-even formula needs, instead of a number reverse-engineered from a spreadsheet weeks later. For the wider picture, see how to run a profitable service business.
A worked example
A two-crew landscaping company wants to know its monthly break-even and a profit plan.
Fixed costs: rent $1,800, insurance $1,100, office admin $3,200, software $500, equipment loans $1,400 = $8,000/month.
Contribution margin: a typical install bills $3,000. Variable costs, crew labor from punched hours at a loaded rate plus plants and materials at average cost, run $1,950. Contribution is 3,000 − 1,950 = $1,050, a ratio of 1,050 ÷ 3,000 = 35%. At 26 crew-hours per job, that is 1,050 ÷ 26 = $40.38 per hour.
Break-even: 8,000 ÷ 0.35 = $22,857 in monthly revenue, about 8 installs, or 8,000 ÷ 40.38 = 198 billable crew-hours.
With a $5,000 profit target: (8,000 + 5,000) ÷ 0.35 = $37,143, about 13 installs, or 322 billable hours.
Now the owner schedules against 322 hours a month, not a vague sense of "stay busy." And because the contribution ratio came from real punched hours, if a wet month pushes labor over and the ratio slips to 30%, the break-even quietly climbs to 8,000 ÷ 0.30 = $26,667, and the owner sees it before the month closes in the red, not after.
Frequently Asked Questions
What is the break-even point for a service business?
It is the amount of revenue at which total costs are exactly covered and profit is zero. Book less than that and you lose money; book more and the excess is mostly profit. You calculate it by dividing your fixed costs by your contribution margin ratio, and it is best expressed in billable hours or jobs so you can schedule against it.
How do I calculate my break-even point?
Total your monthly fixed costs (rent, insurance, salaries, software), then find your contribution margin ratio, which is (revenue − variable costs) ÷ revenue. Break-even revenue is fixed costs ÷ contribution margin ratio. If fixed costs are $9,000 and contribution margin is 40%, break-even is $22,500 a month.
What is the difference between fixed and variable costs?
Fixed costs stay the same regardless of how much work you do, rent, insurance, office salaries, software. Variable costs move with the work, crew labor tied to job hours, materials, subcontractors, fuel. The test is whether the bill changes when you book more or fewer jobs. Sorting costs correctly is the foundation of an accurate break-even.
What is contribution margin per billable hour?
It is the money left from an hour of billed work after that hour's variable costs, available to cover overhead and profit. If a job contributes $800 after variable costs and took 20 crew-hours, contribution is $40 per hour. It is the most practical form of break-even for a service business because you sell and schedule in hours.
How many jobs do I need to break even?
Divide your break-even revenue by the revenue of an average job. If break-even is $22,500 and an average job bills $2,000, you need about 12 jobs a month. Convert to hours by dividing fixed costs by contribution per hour, which gives a target you can schedule the crew against week by week.
Why does my break-even keep changing?
Because its inputs move. Fixed costs shift when you add insurance, software, or a salaried hire, and your contribution margin changes whenever labor runs longer or materials cost more than planned. This is why the margin figure should come from real punched hours and actual material cost, so break-even reflects the business as it is, not as it was bid.
Getting started
Start with the two lists: every fixed cost your business carries in a month, and the variable cost of a typical job. Divide fixed costs by your contribution margin and you have a break-even number, in dollars, jobs, and billable hours, to schedule and price against.
CRMb runs your clients, schedule, inventory, and invoicing on one system and shows the real margin on every job from your crew's actual punched hours, on Mac, iPad, and the web. Start free for 14 days and build your break-even on numbers you can trust.