An hourly rate calculator only helps if it starts from the right question. Not “what does the market charge”, but “what does my year cost, and how many hours can I actually sell”. Enter those two things and the number stops being a guess.
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How to use it
- Add your fixed costs. The monthly total of everything you pay whether or not work comes in.
- Decide what you need to earn. Your own pay for the year, before tax. This is a cost of the business, not the profit.
- Enter the hours you can sell. Billable hours per week, weeks worked per year, and the length of a working day.
- Set a margin, and what you charge now. The gap between the two is the number that matters.
Why most hourly rates are set too low
Two mistakes account for most of it. The first is treating your own pay as profit, so the business looks healthy while you are effectively working for less than you would earn employed. The second is the billable hours illusion: an owner works fifty hours and assumes forty are billable, when quoting, chasing, travelling, ordering and admin quietly eat a third of the week.
If you enter forty billable hours a week on this calculator, the rate will come out low, and it will feel plausible right up until the first quiet month. Twenty-five is a more honest starting point for most sole traders, and the calculator flags anything above roughly 2,200 billable hours a year because very few people can sell that many.
What belongs in fixed costs
Add up the monthly version of: rent or storage, insurance, software and subscriptions, vehicle costs, phone and internet, accounting, tool replacement, professional memberships, and any loan or finance payment on equipment. Leave out materials and subcontractors, which belong on a per-job quote rather than in your hourly rate.
What to pay yourself
Start from what you need to live on, add tax and pension contributions, then add whatever you want the business to retain. If the number feels high, compare it to the salary you would need to earn the same take-home as an employee; contractors carry costs employees do not, and the rate has to reflect that.
Margin is not the same as markup
This calculator multiplies your cost per billable hour by your margin percentage, which is markup on cost. A 15% margin on a £40 cost gives £46. If you think in gross margin instead, the equivalent is dividing cost by (1 minus margin), which produces a higher number. Either is defensible; what matters is that you know which one you used when you set the price.
From an hourly rate to a price the customer accepts
Customers buy outcomes, not hours, so use the hourly figure as your floor and quote the job. The free quote and estimate builder turns that floor into a line-itemed quote with your inclusions and exclusions attached. If you want the language for the covering note, writing quotes and estimates with AI covers it.
Trade-specific versions of the same arithmetic are in the contractor guide and the cleaning business guide, where the billable-hour assumptions differ sharply.
Mistakes worth avoiding
- Rounding down to a tidy number because it feels easier to say. The tidy number is a discount you gave yourself.
- Never revisiting it. Insurance and materials move every year; a rate set two years ago is a pay cut.
- Quoting against the cheapest competitor. They may be subsidising the job with unpaid evenings, which is not a business model you can copy.
- Forgetting the quiet months. Your annual hours should reflect a realistic year, not a good one.
Questions
Is the calculator accurate for my country?
The arithmetic is universal: annual costs divided by sellable hours, plus your margin. Currency, tax rates and typical fixed costs differ, and the calculator deliberately leaves tax out of the rate because that depends on your structure. Use a local accountant for the tax layer.
Should I include tax in my hourly rate?
Keep tax out of the rate itself. If you are registered for VAT or a sales tax, it is added to the invoice, not baked into your price. What you must include is the tax you personally owe on your drawings.
What if I cannot sell enough hours to cover my costs?
Then the problem is not the rate, it is capacity or demand. Either the fixed costs need to shrink, or the work needs to be priced by the job with better margins, or the business needs more billable capacity. Raising the hourly rate rarely fixes an empty diary.
Does this replace an accountant?
No. It gives you a defensible starting number and shows you the assumptions behind it. It is general information, not financial advice.