The main models
| Model | How it works | Good when | Watch out for |
|---|---|---|---|
| Fixed fee | One price for a defined scope | The scope is clear | Extra charges for changes |
| Hourly or day rate | Pay for time spent | Scope is uncertain | Costs that run on |
| Retainer | Monthly fee for ongoing work or access | Regular, repeat needs | Unused hours |
| Value or success-based | Fee linked to an outcome | Outcomes are measurable | Disputes over what counts |
How to compare quotes on different models
- Use the same brief for every provider.
- Ask hourly quoters for an estimate of total hours and a cap.
- Ask fixed-fee quoters exactly what’s included, and the rate for extras.
- For retainers, check what happens to unused hours and the notice period.
- Add expenses, taxes (such as VAT or sales tax) and software costs to every quote.
For professionals: choosing your model
Fixed fees reward efficiency and are easier for clients to approve. Hourly billing protects you when the scope is unclear. Retainers smooth out your income. Work out your floor with the hourly and day rate calculator before you quote.
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Last updated: 5 September 2026
