Free tools for small landlords
Rent-day tools that show their work.
Try one — this month's prorated rent, counted in front of you:
The full prorated rent calculator also does the 30-day method and move-outs, with the math written out for the tenant.
Individual landlords in the US — most managing a couple of units with no staff and no software budget.
Of America's ~50M rental units are owned by individual investors, not property-management companies.
What tenants ever pay RentChime. Reminders are the landlord's tool; the tenant just gets a friendlier rent day.
Market figures: Urban Institute / HUD estimates, commonly cited ranges.
What do you need today?
The mathProrated rent, late fees, rent increases — calculators with the formula written out.
The documentsLate rent notice, lease renewal, deposit return letter, printable receipts.
Rent-day textsReminders your tenants opt into by texting YES. Launching August 2026.
All the tools
These run in your browser. No account, no email required, and nothing you type is sent to us.
- Prorated rent calculator
Rent for a partial month, with the math shown. Days-in-month or 30-day method.
Late fee calculatorFlat, percentage, or per-day late fees. Reminds you to check your state's cap.
Rent increase calculatorNew rent from a percent or dollar increase, plus the annualized rate.
Rent receipt templateFill in a form, print a receipt. Copy-paste template included.
- Late rent notice
A plain late rent notice you can copy, fill in, and send.
- Lease renewal letter
A letter offering your tenant a renewal, with the terms spelled out.
- Security deposit return letter
A letter to send back with the deposit, including an itemized deduction list.
Why the tools are free
Here is the whole business model, plainly: the calculators and letters on this site are free, run in your browser, and send us nothing. We make money one way — landlords who want rent-day reminder texts will pay a flat monthly fee when that launches. No ads, no affiliate links, no selling data, no "free trial" tricks.
That's also why every tool shows its math. If you can check the work, you don't have to trust us — which is, of course, the fastest way to earn trust.
Who makes this
Built by one person, in the open.
RentChime is made by Jon, a product designer outside Chicago who also runs Jon's Reminders — a consent-first text-reminder service he built for his own parents. RentChime brings the same rule to rent day: nobody gets a text they didn't say yes to.
US phone numbers only for now.