Cost Of Doing Business Calculator

Background.

Plenty of freelancers, tradespeople and consultants set their rate by looking at what competitors charge. The trouble shows up later, when a busy year still leaves too little in the account, because the rate was never tested against what the business costs to run. Working out your cost of doing business turns that around: add up what the year costs, including a fair wage for yourself, and divide by the hours someone will actually pay for.

Those last words carry the calculation. A 40-hour week across 52 weeks is 2,080 hours, but nobody bills all of them. Holidays, sick days, quoting, invoicing, chasing late payers, travel between jobs and keeping skills current all take time that never appears on an invoice. Spread $200,000 of annual costs over the full 2,080 hours and the rate looks like $96.15; spread it over 1,200 genuinely billable hours and it is $166.67. Being optimistic about billable time is an easy way to underprice without noticing.

The cost side has two parts. Overhead is everything the business pays whether or not you work on a given day: rent, insurance, software, vehicle, equipment, the accountant, phone and advertising. Owner target pay is the salary you would need from an employer to be as well off. Keeping it as its own line stops your pay from quietly becoming whatever happens to be left over.

The answer is a floor, not a price. Billing exactly this rate pays your target salary and every overhead bill and leaves nothing else: no profit, no cushion for a slow quarter, and no tax beyond whatever you already built into the inputs. The rate you quote should sit above it by a margin you choose on purpose.

What is cost of doing business calculator?

The cost of doing business, expressed per hour, is the amount each billable hour must bring in so that a year's revenue exactly covers the year's costs. The cost base here is annual operating overhead plus the pay the owner wants to draw, and it is divided by the number of hours you expect to invoice in the same year. The result is a break-even rate in dollars per hour: bill less and the business cannot pay your target salary in full; bill more and the difference is profit.

How to use this calculator.

1. 01Total your annual operating overhead from last year's accounts or bank statements: rent, insurance, software subscriptions, vehicle and fuel, equipment, professional fees and marketing. Leave out your own pay, and leave out materials you recharge to clients job by job.
2. 02Enter the yearly pay you want as owner, the figure an employer would have to offer to make you equally well off.
3. 03For annual billable hours, start from 52 weeks, subtract holidays, sick days and quiet spells, then count only the hours in each working week that end up on invoices. Timesheets from a recent month are the best evidence.
4. 04Read the break-even cost per billable hour and the annual cost base, then set your quoted rate above the break-even figure by the profit margin you want.

The formula.

Break-even hourly cost = (annual overhead + owner target pay) ÷ annual billable hours. The sum on top is the annual cost base, reported as its own result: the total the year's billing must recover. The divisor is the number of hours you can invoice. Because billable hours sit underneath, the answer reacts to them far more than to any single cost: cutting billable hours from 1,600 to 1,400 lifts the example rate from $125 to $142.86, while trimming overhead by $10,000 lowers it by only $6.25. Each extra dollar of annual cost adds 1 ÷ billable hours to the rate. Nothing else enters the calculation: no profit margin, no tax and no forecast of how your hours might change. Billable hours must be at least 1, while overhead and owner pay may each be zero.

A worked example.

Frequently asked questions.

References& sources.

1. [1]OpenStax, Rice University. Principles of Finance, 2022. Chapters 6–10. Retrieved 2026-08-06.
2. [2]U.S. Internal Revenue Service. Tax guidance current 2026. Official forms, instructions and tax topics. Retrieved 2026-08-06.
3. [3]U.S. Securities and Exchange Commission. Investor.gov current 2026. Investment products and risk. Retrieved 2026-08-06.