CALCULATORS AND TOOLS

Free real estate and society calculators

Free calculators for societies, landlords and property teams - late fees, GST on maintenance, rental yield, sinking fund, TDS on rent and more.

01 · CALCULATOR
MOST USED
Society late fee calculator
Late charge on overdue maintenance, under any of the three common bye-law rules.
02 · CALCULATOR
Interest on maintenance arrears calculator
Interest on overdue maintenance, at the rate your bye-laws set.
03 · CALCULATOR
Maintenance per sq ft calculator
Per-sq-ft maintenance from a rate, or a rate from your budget.
04 · CALCULATOR
Security deposit interest calculator
Interest on a rental deposit, where the agreement provides for it.
05 · CALCULATOR
MOST ASKED
GST on society maintenance calculator
GST on maintenance, with the threshold logic made explicit.
06 · CALCULATOR
Rental yield calculator
Gross and net yield, with vacancy and costs included.
07 · CALCULATOR
Rent increase calculator
Escalated rent, year by year, with the compounding shown.
08 · CALCULATOR
Sinking fund calculator
Contribution, per-flat share and twenty-year accumulation.
09 · CALCULATOR
TDS on rent calculator
Deduction under 194-I or 194-IB, with the compliance steps.
10 · CALCULATOR
MOST USED
Free rent receipt generator
Formatted rent receipts for an HRA claim, in seconds.
11 · CALCULATOR
Prorated rent calculator
Partial-month rent, on actual days or a 30-day month.
12 · CALCULATOR
Carpet area to built-up area converter
Carpet, built-up and super built-up, with the effective rate.
They run in your browser
Nothing you type into a calculator is transmitted or stored. There is no sign-up and no email gate.
The formula is written out
Every tool shows the arithmetic it used, so you can check it or reproduce it in a spreadsheet.
Bye-laws beat defaults
Where a figure depends on your society’s registered rules, the tool says so rather than assuming a standard.
FAQ

Questions about the calculators.

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Yes. Every calculator and generator - late fees, GST on maintenance, rental yield, TDS on rent, rent receipts and more - is free, requires no signup, and works on mobile.

The tools implement the commonly applied national rules and note where state rules differ - results are reliable estimates for planning, with each tool linking a guide covering the underlying law.

Yes. Everything the tools compute manually - late fees, interest, GST, per-sqft charges - runs automatically inside KeyMatrix billing, which is the point of the platform.

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