Understanding your cost of doing business
The daily cost is acutely sensitive to how many days are actually billable. The table holds the worked example's $150,000 total cost constant and varies only utilization.
| Billable days per year | Daily cost to recover | Hourly (8-hour day) |
|---|---|---|
| 150 days | $1,000.00 | $125.00 |
| 220 days | $681.82 | $85.23 |
| 260 days (every weekday) | $576.92 | $72.12 |
- The result is a break-even floor: pricing at exactly the CODB produces zero profit, so sustainable rates add a margin on top.
- Owner salary is deliberately treated as a cost — a business that cannot pay its owner a market wage is not actually breaking even.
- Overheads should include irregular but real costs: equipment replacement, professional insurance, retirement contributions, and self-employment taxes for solo operators.
- Educational costing tool, not pricing, tax, or accounting advice.
What is the cost of doing business?
The cost of doing business (CODB) is the total annual cost of operating a business — rent, insurance, equipment, software, marketing, professional fees, and other overheads — plus the compensation the owner needs to draw, divided by the days genuinely available for revenue-generating work. The result is the amount each billable day must recover before the business earns its first dollar of profit. The concept is a staple of pricing guidance for freelancers, consultants, photographers, and trades, and appears throughout small-business costing literature from sources such as the U.S. Small Business Administration.
The critical and most-underestimated input is billable days. A 365-day year shrinks fast: weekends remove about 104 days, holidays and vacation another 20–30, and administration, marketing, bookkeeping, and unsold time consume a large share of what remains. Many independent professionals net only 150–230 genuinely billable days, which is why spreading costs over an optimistic day count silently underprices the work.
CODB is a break-even floor, not a price. A sustainable rate adds profit margin on top of it and is also shaped by market rates and the value delivered; but knowing the floor prevents the most common small-business pricing failure — quoting rates that cannot cover overheads and a living wage even at full utilization.
How to use this cost of doing business calculator
- Enter annual business overheads: rent, utilities, insurance, equipment and depreciation, software, marketing, accounting, and any staff costs.
- Enter the salary you need to draw from the business — treating your own compensation as a cost, not a residual.
- Enter your realistic billable days per year, after weekends, holidays, admin time, and unsold capacity — often 150–230 for independent professionals.
- Read the daily cost you must recover, the hourly equivalent based on an 8-hour day, and the annual total.
- Worked example: $90,000 of overheads plus a $60,000 owner salary spread over 220 billable days is $681.82 per day — about $85.23 per hour — meaning any day billed below that level runs at a loss.
The formula behind the cost of doing business
Total annual cost adds overheads and owner salary. Daily cost divides that total by billable days, and the hourly figure divides the day by eight working hours. Because billable days sit in the denominator, overestimating them is the main way this calculation goes wrong — halving the realistic day count doubles the true daily cost.
Common mistakes
- Assuming every weekday is billable — admin, marketing, travel, and unsold time typically cut billable days to 150–230, raising the true daily cost sharply.
- Leaving the owner's salary out of costs and treating whatever is left over as pay, which hides the fact that the business is underpricing.
- Forgetting lumpy overheads such as equipment replacement cycles, annual insurance premiums, and self-employment taxes.
- Quoting the CODB as the price — it is the break-even floor, and a sustainable rate adds profit margin on top of it.
- Never updating the figure; overheads and required income drift upward, and last year's daily cost quietly underprices this year's work.
Часто задаваемые вопросы
How do I calculate my cost of doing business?
Add your annual overheads to the salary you need to draw, then divide by your realistic billable days: ($90,000 overheads + $60,000 salary) ÷ 220 days = $681.82 per day, or about $85.23 per hour on an 8-hour day. Every billable day must recover at least that amount before the business makes any profit.
How many billable days a year should I assume?
Fewer than the calendar suggests. Of 365 days, weekends leave 261; holidays and vacation typically leave 225–235; and administration, marketing, bookkeeping, and gaps between engagements often reduce genuinely billable days to 150–230 depending on the field. Tracking actual utilization for a few months gives the honest number — and using it is the difference between real and imaginary break-even rates.
Should my own salary count as a business cost?
Yes. Treating owner compensation as a cost — set at the market wage the work would command as a job — is standard in small-business costing, because a business that only 'profits' by underpaying its owner is not viable. Whatever remains after overheads and a market-rate owner salary is the true economic profit of the business.
Is the cost of doing business the same as my rate?
No — it is the floor under the rate. CODB tells you the revenue per day needed to break even; a sustainable price adds profit margin (for growth, risk, and slow periods) and reflects market rates and the value of the work. Pricing guidance for independent professionals typically builds the rate as CODB plus a deliberate margin, then sanity-checks it against the market.
What overheads should I include?
Everything the business pays to exist: workspace rent and utilities, business insurance, equipment purchase and replacement reserves, software subscriptions, phone and internet, marketing and website costs, professional fees (accounting, legal), licenses, training, and — for solo operators — health insurance, retirement contributions, and the employer share of self-employment taxes. Reviewing a full year of business bank statements catches the irregular items memory misses.
Источники
- U.S. Small Business Administration (SBA). Calculate your startup costs and manage your finances. sba.gov.
- Internal Revenue Service (IRS). Publication 535: Business Expenses. irs.gov.
- Internal Revenue Service (IRS). Self-employment tax (Social Security and Medicare taxes). irs.gov.
- SCORE (SBA resource partner). Pricing your products and services for profitability. score.org.