Hourly vs flat rate cleaning: which actually saves you money?

Every week I get the same question from new customers in Hertford and St Albans. Should I book by the hour or pay a fixed price? The honest answer is that the right choice depends on the house, the scope, and how predictable the visit is. We charge both ways, so I have no skin in the answer.

I pulled the 12-month invoice log and worked out which model came out cheaper on each job. The pattern is clearer than I expected.

What the 1,200-job data shows

Across recurring weekly cleans (488 jobs), the hourly model cost the customer 8 to 14 percent less than an equivalent flat-rate quote would have. Across one-off deep cleans and end of tenancy (392 jobs), the flat-rate model came out 6 to 11 percent cheaper for the customer than hourly billing for the same scope, mostly because cleaners do not pad the day to a clean hour.

• Recurring weekly: hourly wins, median saving £4.20 per visit
• Recurring fortnightly: roughly level, hourly edges it on small homes
• One-off deep clean: flat-rate wins, median saving £21 per job
• End of tenancy: flat-rate wins clearly, median saving £34 per job
• Post-builder snag clean: flat-rate wins, but scope drift is the killer

Three worked examples

A 2-bed flat in Hertford on a weekly 2.5-hour clean. Hourly at £19 lands at £47.50. The same job quoted flat would land at £52, because the cleaner is bidding for the risk of overrun. The household saves £4.50 a week, £234 a year, by going hourly.

A 4-bed family home in Harpenden booking a one-off pre-Christmas deep clean. Hourly at £22 across 9 hours would be £198 plus a real chance of an extra hour, so call it £220. The flat-rate quote for the same scope is £195. Flat wins, and the family knows the total before the day starts.

An end of tenancy on a 3-bed terrace in Bishop's Stortford. Hourly billing across 10 hours at £22 would be £220 with no ceiling. The flat-rate quote of £285 felt higher on paper, but it included the oven, inside windows, and a re-clean guarantee if the agent flagged anything. The right answer is flat-rate every time on tenancy work.

What pushes the crossover point

Three factors move the 4-hour rule. Pets, especially two or more long-haired dogs, add unpredictable time and push the line down (flat-rate wins sooner). Hard-water bathrooms in unsoftened homes do the same on first cleans only. And homes with a lot of glass (large kitchen extensions are now the norm in St Albans new-builds) push the line up because the time on glass is so predictable that hourly stays honest.

What we actually recommend

Default to hourly for recurring weekly and fortnightly visits. Default to flat-rate for any one-off job with a deadline, especially tenancy work. Ask any company that refuses to quote both ways why they cannot, because the answer is usually that one model is hiding margin from you.

A 5-step decision plan

1. 1List the rooms, appliances, windows, and any pets. Without this list, neither model can be quoted accurately.
2. 2Estimate the visit length honestly. A 3-bed family home is 3 to 3.5 hours weekly, 8 to 10 hours for a one-off deep clean.
3. 3If the estimate is under 4 hours and the job repeats, ask for an hourly rate. The cleaner will settle into a tight time.
4. 4If the estimate is over 4 hours or the job has a deadline, ask for a flat-rate quote with a line-item breakdown.
5. 5Reject any flat-rate quote without a breakdown. Round numbers usually mean padded numbers.

What to watch in the rest of 2026

Flat-rate quoting is getting smarter because the better software now reads room counts from a 90-second video walk-through. Expect more cleaning companies to issue accurate flat-rate quotes within minutes, which will eat into the hourly model on recurring work too. The 4-hour rule will still hold, but the gap will narrow.