When a tenant moves in mid-month on a Calendar lease, Bedspace Manager automatically calculates the correct prorated amount for the first billing period — using whichever method you choose in your business settings.
Or skip ahead — calculate a prorated first invoice, free
Enter the monthly rent, the tenant's move-in date, and your preferred denominator, and get the exact prorated amount for that first billing period — no spreadsheet formula required.
This is the same formula Bedspace Manager runs automatically on every Calendar lease. Use it here for a one-off quote, or set your denominator once in business settings and let every future mid-month move-in prorate itself.
This calculator
A one-off, manual check — type in a date and rent, get the prorated amount instantly.
Bedspace Manager, once you're set up
Runs on every mid-month move-in automatically, and prints the calculation on the tenant's invoice.
From the blog
The Real Cost of Tracking Leases in a Spreadsheet
Why proration is where manual formulas break first — and quietly get it wrong.
Prorated Rent Calculator
Figures in USD · updates live
First invoice, prorated
$822.58
for 17 of 31 days in March 2026
Daily rate used
$48.39
Every month after
$1,500.00
This mirrors exactly how Bedspace Manager bills a Calendar lease's first invoice — pick your denominator once in business settings, and every future mid-month move-in prorates itself, with the math shown on the tenant's invoice.
Automate it freeNeither method is wrong — they just serve different preferences. Pick the one that fits your business and tenants, set it once, and Bedspace Manager handles every calculation from there.
The daily rate is calculated by dividing the monthly rent by the actual number of days in that specific month — 28, 29, 30, or 31.
$1,500/month, move-in March 15 (31-day month)
$1,500 ÷ 31 days = $48.39/day
March 15–31 = 17 days × $48.39 = $822.58
When to use: Precise billing that reflects the true daily cost. Daily rate varies by month.
The daily rate is always calculated by dividing the monthly rent by 30, regardless of how many days the actual month has.
$1,500/month, move-in March 15 (31-day month)
$1,500 ÷ 30 days = $50.00/day
March 15–31 = 17 days × $50.00 = $850.00
When to use: Consistent daily rate every month. Simpler to explain to tenants.
Only applies to Calendar billing
Custom billing always covers exactly 30 days from move-in — there is no proration
Only the first month is prorated
From the 2nd billing cycle onward, every cycle is a full month — no partial periods
Configured once at business level
Set your preferred denominator in business settings — it applies to all Calendar leases
Automatic — no manual calculation
Enter the move-in date and monthly rent; the system calculates the prorated amount
Visible on the invoice
The prorated first-month invoice shows the calculation so tenants understand the charge
Enter move-in date and monthly rent. Bedspace Manager handles the rest — accurately, every time.
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