Day rate, hourly or fixed fee: who carries the risk
Choosing a billing mode is not a matter of preference. It is a decision about what you sell, and about who pays when things do not go as planned.
Day rate: you sell availability
The client buys days. If the assignment stretches, you invoice more; if it stops, you invoice less. The risk of things running long sits with the client.
It is the clearest mode for long assignments, and also the most exposed to gaps: a week without an assignment is a week without income, with nothing in an order book to see it coming.
Hourly: you sell precision
Same logic, finer grain. This is the mode for work that is short, fragmented or unpredictable — support, maintenance, one-off expert opinions.
It carries a hidden cost: counting in hours means counting all the time. Loose tracking translates directly into lost income, and nobody reconstructs last month's hours from memory.
Fixed fee: you sell an outcome
The client buys a deliverable for a price. If it takes you half the time you expected, the margin is yours; twice the time, so is the loss. The risk changes sides.
A fixed fee is only reasonable on a scope you know how to frame. It also demands commercial discipline: anything outside the scope is renegotiated, otherwise the fixed fee quietly becomes unpaid time and materials.
When the project slips
That is where the choice is paid for:
- On a day or hourly rate, a delay is invoiced. The conversation is financial, not adversarial.
- On a fixed fee, a delay costs you. The conversation becomes a negotiation about scope, and it gets harder the later it happens.
Hence the rule of thumb: the greater the uncertainty, the worse the fit for a fixed fee.
In practice, you mix
Most freelancers end up with a mixed portfolio: one long assignment at a day rate for stability, a few fixed fees for margin, some hourly work for one-off requests.
That is not inconsistency, it is hedging. What matters is knowing, for each contract, which side carries the risk.