A prorated rent calculator works out the rent for a partial month. Enter the monthly rent and a move-in or move-out date, and it divides the rent into a daily rate and multiplies it by the days you actually occupy the unit. It shows the three methods landlords use side by side.
Quick answer: Prorated rent = (monthly rent ÷ days in the month) × days occupied. For $1,800 rent and a move-in on November 18, the unit is yours for 13 of 30 days, so the rent is $1,800 ÷ 30 × 13 = $780.00.
How to use the prorated rent calculator
- Type the monthly rent from your lease.
- Choose Move in, Move out or Any two dates, then pick the date or dates.
- Choose how the daily rate is set: actual days in the month, a flat 30-day month or annual rent divided by 365. If your lease does not say, ask the landlord.
- Tick Also add the next full month if you want the total for a mid-month move-in with the first full payment.
- Read the prorated rent, the daily rate, the share of the month and the comparison of all three methods.
The prorated rent calculator runs in your browser and keeps your numbers on your device. Both the first and the last day are counted, which is the usual way to count days you occupy a unit.
How to calculate prorated rent: the formula
Wikipedia explains that pro rata is a Latin phrase meaning in proportion, and that in American English it has become prorated. For rent, the proportion is the number of days you occupy the unit out of the days in the billing period. Trulia's renter guide describes it the same way: a daily rate multiplied by the number of days you occupied the unit.
- Daily rate = monthly rent ÷ days in the month (28, 29, 30 or 31).
- Days occupied = last day − first day + 1, so both end days count.
- Prorated rent = daily rate × days occupied.
- Percent of the month = days occupied ÷ days in the month.
Prorated rent formula in three versions
The formula is always a daily rate times days, but landlords set the daily rate in one of three ways. The method matters because it changes the amount by a few dollars on every partial month.
- Actual days: rent ÷ the real length of the month. A full month always costs exactly one month of rent.
- 30-day month: rent ÷ 30 in every month. The daily rate never changes, so long months need a cap at one month of rent.
- Annual rate: rent × 12 ÷ 365 (366 in a leap year), one flat rate for the whole year.
Prorated rent example: moving in on November 18
Take rent of $1,800 a month and a move-in on November 18. November has 30 days, and the days from the 18th to the 30th, counting both, are 13. Here is the same move-in under each method.
| Method | Daily rate | Days | Prorated rent |
|---|---|---|---|
| Actual days (November = 30) | $60.00 | 13 | $780.00 |
| Flat 30-day month | $60.00 | 13 | $780.00 |
| Annual rent ÷ 365 | $59.18 | 13 | $769.32 |
The first two agree because November has exactly 30 days. In a 31-day month they differ. Trulia's example uses $1,500 and a July 20 move-in, 12 days. The same figures are in the next table, and the prorated rent calculator reproduces them.
| Method | How the daily rate is set | Daily rate | Days | Prorated rent |
|---|---|---|---|---|
| Actual days (July) | $1,500 ÷ 31 | $48.39 | 12 | $580.65 |
| Flat 30-day month | $1,500 ÷ 30 | $50.00 | 12 | $600.00 |
| Annual rent | ($1,500 × 12) ÷ 365 | $49.32 | 12 | $591.78 |
Prorated rent move in: charging from the move-in day
For a move-in, rent runs from the day you take the unit to the last day of that month, and the next full month starts on the 1st. The earlier in the month you arrive, the more days you pay. This table shows $1,800 rent for a November move-in (30 days) and a December move-in (31 days), using actual days.
| Move-in day | November days | November rent | December days | December rent |
|---|---|---|---|---|
| 1 | 30 | $1,800.00 | 31 | $1,800.00 |
| 5 | 26 | $1,560.00 | 27 | $1,567.74 |
| 10 | 21 | $1,260.00 | 22 | $1,277.42 |
| 15 | 16 | $960.00 | 17 | $987.10 |
| 20 | 11 | $660.00 | 12 | $696.77 |
| 25 | 6 | $360.00 | 7 | $406.45 |
| 28 | 3 | $180.00 | 4 | $232.26 |
| 30 | 1 | $60.00 | 2 | $116.13 |
A move-in on the 1st is a full month and needs no proration, so the prorated rent calculator returns one month of rent. Some leases make rent due on the move-in day each month instead. Then every month is a full month, and the lease ends on the anniversary date.
Prorated rent move out: charging to the move-out day
For a move-out, rent runs from the 1st to the day you leave. Trulia notes that if you are allowed to stay until the end of the month and choose to leave early, it is likely fair to pay the full amount. Proration is most reasonable when the unit is handed back or re-let and the landlord will charge the next tenant for those days. The prorated rent calculator treats the move-out day as the last day charged.
| Move-out day in February 2027 | Days | Actual days (28) | Flat 30-day | Annual ÷ 365 |
|---|---|---|---|---|
| 5 | 5 | $321.43 | $300.00 | $295.89 |
| 10 | 10 | $642.86 | $600.00 | $591.78 |
| 15 | 15 | $964.29 | $900.00 | $887.67 |
| 20 | 20 | $1,285.71 | $1,200.00 | $1,183.56 |
| 25 | 25 | $1,607.14 | $1,500.00 | $1,479.45 |
February shows the largest gap. With actual days, a February daily rate is $64.29, while a 30-day month charges $60.00 and the annual method $59.18.
Prorated rent 30 day month versus actual days and 365
No single method is correct everywhere. Residential leases name one, and when they do not, the landlord's accounting software usually decides. The table shows the daily rate for $1,800 rent in every month. Actual days make the daily rate move with the calendar, while the other two stay flat.
| Month | Days | Actual days rate | 30-day rate | Annual rate |
|---|---|---|---|---|
| January | 31 | $58.06 | $60.00 | $59.18 |
| February | 28 | $64.29 | $60.00 | $59.18 |
| March | 31 | $58.06 | $60.00 | $59.18 |
| April | 30 | $60.00 | $60.00 | $59.18 |
| May | 31 | $58.06 | $60.00 | $59.18 |
| June | 30 | $60.00 | $60.00 | $59.18 |
| July | 31 | $58.06 | $60.00 | $59.18 |
| August | 31 | $58.06 | $60.00 | $59.18 |
| September | 30 | $60.00 | $60.00 | $59.18 |
| October | 31 | $58.06 | $60.00 | $59.18 |
| November | 30 | $60.00 | $60.00 | $59.18 |
| December | 31 | $58.06 | $60.00 | $59.18 |
Which method is fairest
Actual days always add up: if you stay the whole month you pay exactly one month of rent. The 30-day method is simple and gives the same daily rate all year, but a 31-day month would cost 31 × $60 = $1,860 unless the lease caps it at the monthly rent. The annual method gives $1,834.52 for a full 31-day month at $1,800, so it needs the same cap.
| Days stayed | Actual days | Flat 30-day, uncapped | Annual, uncapped |
|---|---|---|---|
| 28 (February) | $1,800.00 | $1,680.00 | $1,656.99 |
| 30 (April) | $1,800.00 | $1,800.00 | $1,775.34 |
| 31 (January) | $1,800.00 | $1,860.00 | $1,834.52 |
The prorated rent calculator applies that cap. A full month never costs more than the monthly rent under any of the three methods.
First payment: prorated rent, the next month and the deposit
A mid-month move-in often means two rent payments close together: the partial month and the first full month. Trulia also points out that fees and utilities are often not prorated, even when the base rent is. The security deposit is a separate charge, and the prorated rent calculator can add the next full month to show the first payment.
| Item | Amount |
|---|---|
| Prorated rent, November 18 to 30 | $780.00 |
| December rent (full month) | $1,800.00 |
| Security deposit (example, one month) | $1,800.00 |
| Total at move-in | $4,380.00 |
Prorated rent calculator for a custom date range
In the Any two dates mode, the prorated rent calculator handles stays that cover more than one month, such as a short-term rental or a lease that starts mid-month and ends mid-month. It prorates each calendar month separately and adds them up. A stay from November 18 to January 9 on $1,800 rent is 13 days of November, all of December and 9 days of January.
| Month | Days charged | Days in month | Rent (actual days) |
|---|---|---|---|
| November 2026 | 13 | 30 | $780.00 |
| December 2026 | 31 | 31 | $1,800.00 |
| January 2027 | 9 | 31 | $522.58 |
| Total | 53 | $3,102.58 |
Prorated rent calculator for weekly rent: pw to pcm
In the UK, Ireland and Australia, rent is often quoted per week, while many listings show a calendar month figure. The usual conversion is weekly rent × 52 ÷ 12. A rent of 300 a week is 1,300 per calendar month, and a rent of $500 a week is about $2,166.67 a month. Convert first, then use the prorated rent calculator with the monthly figure, or multiply the weekly rent by the days divided by 7.
| Weekly rent | Per calendar month (× 52 ÷ 12) | Daily (÷ 7) | 10 days |
|---|---|---|---|
| $200 | $866.67 | $28.57 | $285.71 |
| $300 | $1,300.00 | $42.86 | $428.57 |
| $400 | $1,733.33 | $57.14 | $571.43 |
| $500 | $2,166.67 | $71.43 | $714.29 |
| $600 | $2,600.00 | $85.71 | $857.14 |
Prorated rent with free weeks or free months
Move-in specials are often written as weeks or months of free rent. How a landlord counts them changes the numbers, so ask for the figure in writing. One common way is to divide the free weeks by 52 and take that share of the annual rent. On a 12-month lease at $2,000 a month with 6 weeks free, the concession is 6 ÷ 52 × $24,000 = $2,769.23, and the net effective rent is ($24,000 − $2,769.23) ÷ 12 = $1,769.23 a month.
| Free weeks on a 12-month lease | Value of the concession | Net effective rent per month |
|---|---|---|
| 2 | $923.08 | $1,923.08 |
| 4 | $1,846.15 | $1,846.15 |
| 6 | $2,769.23 | $1,769.23 |
| 8 | $3,692.31 | $1,692.31 |
| 10 | $4,615.38 | $1,615.38 |
The effective rent is a way to compare offers. The lease still bills the full rent after the free period, so a prorated amount for the first partial month may be due in addition.
Daily rent by monthly rent
This lookup gives the daily rate for common rents. Multiply by the days you occupy the unit, or by 7 for a weekly figure.
| Monthly rent | 28-day month | 30-day month | 31-day month | Annual (365) |
|---|---|---|---|---|
| $800 | $28.57 | $26.67 | $25.81 | $26.30 |
| $1,000 | $35.71 | $33.33 | $32.26 | $32.88 |
| $1,200 | $42.86 | $40.00 | $38.71 | $39.45 |
| $1,500 | $53.57 | $50.00 | $48.39 | $49.32 |
| $1,800 | $64.29 | $60.00 | $58.06 | $59.18 |
| $2,000 | $71.43 | $66.67 | $64.52 | $65.75 |
| $2,500 | $89.29 | $83.33 | $80.65 | $82.19 |
| $3,000 | $107.14 | $100.00 | $96.77 | $98.63 |
When to ask for prorated rent
- Moving in on any day except the 1st, or out on any day except the last.
- The lease lists when rent is prorated. If it does not mention it, ask in writing before you sign.
- Another tenant moves in right after you, so the landlord is paid for those days twice otherwise.
- A repair or loss of a service made part of the month unusable. This is a different question, and local rules apply.
Before you use the prorated rent calculator for a dispute, note that Trulia states there are no specific nationwide renter rights about prorated rent, but many state and local landlord-tenant laws may apply to certain situations. Check your lease and your local housing authority for rules that cover your case.
Common mistakes
- Not counting the move-in day. A move-in on the 18th of a 30-day month is 13 days, not 12.
- Mixing methods, such as using 30 days for the daily rate and the real month length for the days.
- Prorating the deposit, fees or utilities when the lease prorates only rent.
- Forgetting that the next full month is due on the 1st, so the first two payments land close together.
- Rounding the daily rate to cents before multiplying, which can shift the total by a few cents. The prorated rent calculator keeps full precision and rounds only the answer.
Frequently asked questions
10 quick answers
How do you calculate prorated rent with a prorated rent calculator?
Divide the monthly rent by the days in the month to get a daily rate, then multiply by the days you occupy the unit. For $1,800 and 13 days in a 30-day month, the result is $780.00.
Is the move-in day counted?
Usually yes. Moving in on the 18th of a 30-day month means you pay the 18th through the 30th, which is 13 days. Check your lease if it counts differently.
Does prorated rent use 30 days or the real days in the month?
It depends on the lease. Many landlords use the actual days, some use a flat 30-day month, and some property managers use annual rent divided by 365.
What is the difference between the three methods?
Actual days make a full month cost exactly the rent. The flat 30-day and annual methods keep one daily rate all year and need a cap in long months.
Is the last month of rent prorated?
It can be. If you leave before the end of the month and the lease allows it, rent can be prorated to the move-out date. Many leases require the full month.
Is the security deposit prorated?
No. The deposit is a separate amount and does not change with the day you move in. Fees and utilities may also be charged in full.
How do I prorate rent for a weekly or biweekly period?
Use the daily rate times 7 for a week, or 14 for two weeks. For a monthly rent of $1,800 in a 30-day month, a week is $420.00.
Can a landlord charge a full month if I move in mid-month?
Some landlords require the full first month regardless of the move-in day. Where the lease and local law are silent, it is the landlord's decision, so settle it before you sign.
How is prorated rent handled in February?
With actual days, February has the highest daily rate, because 28 days share one month of rent. A flat 30-day month charges less per day in February.
Does the prorated rent calculator work for any currency?
Yes. Pick a currency in the prorated rent calculator. The same formula applies to any amount of monthly rent.
Related calculators
- Days between dates calculator to count the days of a stay
- Date calculator to add or subtract days from a date
- Budget calculator to fit rent into monthly spending
- Percentage calculator for the share of a month
- All free calculators
Sources and further reading
- Trulia: What Is Prorated Rent? A Renter's Guide: the three methods, the July 20 comparison and when to ask
- Pro rata (Wikipedia): the meaning of prorated
- RentRedi: What Is Prorated Rent and How to Calculate It: a landlord's view of the calculation
This page is general information and not legal advice. Your lease and local law decide how rent is prorated. Last reviewed: October 2026.