Turn your society's monthly budget into a fair rate per sq ft, then see what each flat pays by its area — and compare it against an equal-rate split so the committee can choose the fairer basis. Free, no login, prints to PDF for the notice board.
Nothing you type is stored — it stays in your browser.
Security, housekeeping, lift AMC, common utilities, sinking + repair fund.
Sum of carpet (or built-up) area across all units — use one consistent basis. In sq ft.
Enter any flat's area to see its monthly charge on each method.
Your result
Rate per sq ft
—
per month
Indicative only. GST may apply per unit above ₹7,500 — check separately.
This calculator gives indicative figures for planning only and is not legal, tax or accounting advice. The fair basis for splitting maintenance (per-sq-ft vs equal-rate, and carpet vs built-up area) is usually fixed by the society bye-laws or a general body resolution under the applicable state cooperative-society act. GST may apply on units crossing ₹7,500 per member per month where the society's turnover exceeds ₹20 lakh. Confirm with your society auditor.
How the split works
Divide the total monthly budget by the total chargeable area to get a rate, then bill each flat on its own area: Rate per sq ft = Monthly budget ÷ Total area, and Flat charge = Rate × Flat area. A ₹6,00,000 budget across 2,00,000 sq ft is ₹3 per sq ft, so a 1,000 sq ft flat pays ₹3,000 and a 1,500 sq ft flat pays ₹4,500.
Every flat pays the same amount regardless of size: Equal charge = Monthly budget ÷ Number of flats. Simpler to administer, but a compact 1-BHK subsidises a large 3-BHK that uses more of the building's shared services. Some older societies still bill this way.
Per-sq-ft is widely regarded as the fairer basis for societies with mixed flat sizes, since larger homes generally place a larger load on common infrastructure. Equal-rate suits societies where all flats are near-identical. The society bye-laws or a general body resolution usually fix the method, so confirm yours before changing it.
Use one consistent area definition for every unit. Many societies bill on carpet area; others use built-up or super built-up. The absolute rate changes with the basis, but as long as it's applied uniformly the split between flats stays fair.
A per-sq-ft split can push large flats above ₹7,500 per member per month while smaller flats stay below it. Where the society's turnover also exceeds ₹20 lakh, 18% GST then applies on the full charge for those larger units — so GST can apply flat by flat. Check each unit with the society maintenance GST calculator.
Budget ₹6,00,000 ÷ 2,00,000 sq ft = ₹3/sq ft. Equal-rate across 160 flats = ₹3,750/flat.
| Flat size | Per-sq-ft charge | Equal-rate charge | Who pays more |
|---|---|---|---|
| 650 sq ft (1-BHK) | ₹1,950 | ₹3,750 | Saves on per-sq-ft |
| 1,000 sq ft (2-BHK) | ₹3,000 | ₹3,750 | Slightly less |
| 1,500 sq ft (3-BHK) | ₹4,500 | ₹3,750 | Pays more on per-sq-ft |
Illustrative. Per-sq-ft shifts cost toward larger flats; equal-rate spreads it evenly.
From rate to monthly invoices
This tool finds the rate. EstateDeck applies it to every unit at billing — per-sq-ft on each flat's area, sinking and repair fund splits added, the ₹7,500 GST rule checked per member, late fees and DLT-compliant reminders, and UPI collection — so the committee issues a correct invoice to all residents each month without a spreadsheet.
/sq ft
rate applied per unit
Funds
sinking + repair split
₹7,500
GST rule per member
UPI
collection + reminders
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Maintenance split, answered
Divide the total monthly budget by the total chargeable area to get a per-sq-ft rate; each flat pays that rate times its own area. A ₹6,00,000 budget across 2,00,000 sq ft is ₹3/sq ft, so a 1,000 sq ft flat pays ₹3,000 a month.
Per-sq-ft means larger flats pay more, in proportion to area. Equal-rate means every flat pays the same regardless of size. Per-sq-ft is generally fairer for mixed sizes; equal-rate is simpler. Some bye-laws specify one — check yours.
Many societies use carpet area; others use built-up or super built-up. What matters is one consistent basis for every unit. The bye-laws or a general body resolution usually fix which definition applies.
Only where the per-member charge exceeds ₹7,500 and society turnover exceeds ₹20 lakh; then 18% GST applies on the full amount. A per-sq-ft split can push larger flats over ₹7,500 while smaller stay exempt, so GST may apply unit by unit.
Typically security and housekeeping wages, lift and equipment AMC, common-area electricity and water, garden upkeep, minor repairs, and sinking + repair fund contributions. Capital items are usually funded from the sinking fund, not monthly maintenance.
No — it's free and runs in your browser. If your society runs EstateDeck, the per-sq-ft rate is applied to every unit automatically at billing, with fund splits, the ₹7,500 GST rule, late fees and UPI collection handled together.
EstateDeck bills each unit on its area, adds fund splits and the GST rule, and collects over UPI — no spreadsheet each month.
