Hourly billing hands the client the entire $1,100 the agent saved

A dev.to post on 2026 freelance rates works the example: ten hours, at an assumed $110 an hour, for a CSV import that used to take twenty ^[12]. Three of those hours are the agent drafting the parser, the mapping UI and the tests. Five go to finding the parts that are almost right: encoding edge cases, a date column that silently swaps day and month, a memory spike on a 200 MB file. Two more rewrite the error handling so the client's customer sees which row failed and why ^[11]. Billed hourly, the invoice is $1,100 ^[13]. The old invoice was $2,200, so the client keeps the whole $1,100 the tooling saved ^[18].

Half of the remaining work is review of generated code ^[19]. Arc's 2026 rates guide explains the top of its range in those terms. AI "increased demand for experienced engineers", the guide says, because someone still has to architect the system, review the generated code and own the security decisions ^[4].

The Arc figures are one year of bands by seniority, drawn from 5,302 freelance developers, and the guide as reported does not include the previous year's bands ^[1]. So the pay premium for architecture and review rests on Arc's reading of its own top band, one year of it. The rate with a history attached is freelancermap's average: it was 96 euros in 2022, and about 7% higher in nominal terms four years later, with the latest step downward ^[6][20]. That average pools juniors with principals in a mostly German-speaking sample ^[5]. The dip landed in the same study where 85% of respondents said they actively use AI tools for writing, coding and images ^[7].

For the ten-hour week to be your number, somebody has to have timed it. The gap between what METR's participants believed about their own speed and what the study measured was about 39 points ^[21]. METR calls the result a snapshot ^[17].

A fixed quote is written from memory of how long the last job took. The post's fixed example is $2,200 for "CSV import with row-level error reporting, files up to 250 MB, tested against the three sample exports you supplied" ^[14]. That price holds if the sentence defines done. The almost-right problem reported by two thirds of Stack Overflow's respondents is what the sentence has to cover ^[9].

Only the hourly model pays less as the tools get better ^[25]. Few price lists are built to do that. The third option in the post prices against the client's own cost, an ops team's day a month spent re-keying spreadsheets, with a written acceptance test ^[15].