Pro Rata Rent in the UK: How to Calculate It (Landlord and Tenant Guide)
UK pro rata rent uses a slightly different set of conventions to US prorated rent. This guide covers the daily-rate, calendar-month, and 52-week methods, with worked examples for mid-month move-ins and assured shorthold tenancies.
Pro rata rent charges a tenant only for the days they actually occupy a partial month. The standard UK formula is
pro rata = monthly rent ÷ days in month × days occupied. Most assured shorthold tenancies use the calendar-month daily rate, but the agreement may name a flat 30-day or 52-week method instead.
Our prorated rent calculator runs the numbers for any of these methods.
The calendar-month daily rate is the most common method in UK assured shorthold tenancies. A mid-month move-in is charged for the days from the move-in date through the end of that month.
The three UK pro rata methods
The calendar-month daily rate divides by the real length of the month. It uses the actual day count, which varies through the year, so the daily rate shifts month to month. This is the common method in private residential tenancies.
The flat 30-day daily rate keeps the divisor constant. Some landlords prefer it because the daily rate never changes through the year. Tenants come out ahead on short stays in long months and worse off in February.
The 52-week method annualises the rent first. It spreads the year evenly and produces the fairest day rate across a full twelve months. Some letting agents use it, and most commercial property does. It sits closest to the method HMRC applies to rental income.
Worked move-in examples
In a 30-day month, the calendar-month and flat 30-day methods land in the same place. The 52-week method comes in a touch lower because its day rate is spread across the whole calendar year rather than a single month.
February is where the three methods disagree most sharply. The short month pushes the calendar-month daily rate up, so the same days occupied cost more than under the annualised method.
Move-out pro rata
Moving out is the mirror case: you pay for the days lived in the final month, not the days remaining. Tenancy agreements usually state whether the last day of notice is a paid day, and the default UK convention is that the day you hand back the keys counts.
Rent per day in the UK
When an agreement quotes a daily rent, it comes from one of the three methods. If the agreement does not specify, assume the calendar-month daily rate for monthly tenancies and the 52-week method for weekly tenancies. The cross-check below shows how the same monthly rent produces a different daily figure depending on the method.
Assured shorthold tenancy specifics
Most UK private rentals are assured shorthold tenancies, and three pro rata rules are worth knowing.
Tenancy deposit protection is calculated on the agreed rent, not the pro-rated amount. A partial first month does not shrink the deposit base.
Rent is due in advance, not in arrears. Pro rata for the first partial month is typically collected alongside the deposit before move-in.
Holding deposits always use the 52-week method, by law. The Tenant Fees Act 2019 caps a holding deposit at one week's rent and fixes how that week is worked out, whatever method governs the rest of the tenancy. A landlord using the 30-day method for monthly pro rata must still compute the holding deposit this way. It is a statutory rule, not a contractual choice.
What about Scotland?
Scottish private residential tenancies follow the same pro rata maths. The arithmetic is identical to England and Wales. The differences sit in statutory notice periods and rent-review rules, which are legal rather than calculation matters.
What the tenancy agreement should state
Three lines remove most disputes. Getting these in writing before you sign beats a formal dispute later, so ask in email if the agreement is silent.
Common mistakes
A few errors come up again and again. Most trace back to assuming a method instead of reading the agreement.
Assuming every landlord uses one method → they vary, so check the agreement Using a 30-day divisor in February → calendar month means 28 or 29 days Ignoring the holding-deposit rule → 52-week method only, by statute Confusing council tax with rent → the council prorates it, not the landlord
Quick reference
If your agreement does not name a method, treat the calendar-month daily rate as the default for monthly tenancies and confirm it in writing before you sign. For a fuller walkthrough of the general formulas and move-in and move-out conventions, see how to calculate prorated rent.
Common questions
The calendar-month daily rate is the most common in private residential tenancies. It divides the monthly rent by the actual number of days in the month, then multiplies by the days occupied. If the agreement names a different method, that one applies instead.
No. Holding deposits are fixed by the Tenant Fees Act 2019 at one week's rent worked out with the 52-week method, monthly rent × 12 ÷ 52. This holds even when the rest of the tenancy uses the calendar-month or 30-day method. It is a statutory rule, not a contractual choice.
No. Tenancy deposit protection is based on the agreed monthly rent, not the partial first-month figure. A partial first month does not reduce the deposit base.
No. Scottish private residential tenancies use the same pro rata arithmetic as England and Wales. The differences are legal, covering notice periods and rent-review rules, rather than the calculation itself.
