How do you use the should I buy this property calculator?
- Enter the price, pick the property type and set your down payment. The loan stays within RBI limits.
- Enter your monthly take-home pay and, if you know it, the savings you can put into this purchase.
- Open “Other EMIs, limits and fair value” to add EMIs you already pay, maintenance, your EMI limit, the months of outgo you want to keep aside and your own estimate of what the flat is worth.
- Read the verdict and the three checks. Change one number at a time to see what makes it fit.
What does the calculator check?
It answers one question: can you carry this purchase on the numbers you entered? It does not judge the location, the builder or the title. For those, use the property risk assessment and builder trust score checklists.
The three checks
(New EMI + other EMIs) ÷ take-home pay ≤ your limitSavings − (down payment + govt charges) ≥ months to keep aside × monthly outgoPrice ≤ your fair-value estimateAny fail = Not yet; any “check” = A stretch; otherwise FitsThe 40% EMI limit and six months of buffer are starting points you can change. They are your rules, not a bank’s. Banks set their own limits.
Worked example: ₹ 80 L resale flat, ₹ 1.5 L take-home
With 20% down the loan is ₹ 64,00,000, within the 80% RBI limit for loans up to ₹ 75 L. Stamp duty, cess, surcharge and registration come to ₹ 6,08,000 (7.6%), so the cash needed is ₹ 22,08,000.
At 8.5% for 20 years the EMI is ₹ 55,541. With ₹ 10,000 of other EMIs that is 43.7% of take-home, above a 40% limit, so the verdict is “Not yet”. Savings of ₹ 25 L leave ₹ 2,92,000 after buying. An EMI of up to ₹ 50,000 would fit the limit.
Worked example: ₹ 45 L first-sale flat, ₹ 90,000 take-home
The first sale of a flat at ₹ 45 L pays 3% duty, so government charges are ₹ 2,41,200 (5.36%). With 20% down the cash needed is ₹ 11,41,200 and the EMI is ₹ 31,242, 34.7% of take-home. Savings of ₹ 15 L leave ₹ 3,58,800, which covers six months of outgo (₹ 1,87,450). Verdict: Fits.
What share of take-home pay does the EMI take?
| Price | ₹ 1.00 L a month | ₹ 1.50 L a month | ₹ 2.00 L a month | ₹ 3.00 L a month |
|---|---|---|---|---|
| ₹ 50.00 L | 35% | 23% | 17% | 12% |
| ₹ 75.00 L | 52% | 35% | 26% | 17% |
| ₹ 1.00 Cr | 65% | 43% | 33% | 22% |
| ₹ 1.50 Cr | 98% | 65% | 49% | 33% |
| ₹ 2.00 Cr | 130% | 87% | 65% | 43% |
What stamp duty and registration apply in Bengaluru?
On a sale deed in Bengaluru, Karnataka charges 5% stamp duty on the market value (Karnataka Stamp Act, Schedule Art. 20(1)), a 10% cess on the duty (s.3B) and, inside the Greater Bengaluru Area, a 2% surcharge on the duty (Greater Bengaluru Governance Act 2024, s.170). The registration fee is 2% (IGR notification of 29 Aug 2025, in force from 31 Aug 2025). Together that is 7.6% of the value. The first sale of a flat pays less duty: 2% up to ₹ 20 L and 3% above ₹ 20 L up to ₹ 45 L, so the total is 4.24% or 5.36%. Resale flats, plots and houses pay 5% at any price. Rates verified 18 Oct 2026 · confirm on Kaveri Online before registering.
What does this calculator leave out?
- Location, builder, legal title and construction quality.
- Interiors, moving and other costs after you buy. Add them to the buffer or use the hidden cost calculator.
- Future price growth and rent. See the property ROI calculator.
- Tax benefits on the home loan. Ask your CA.
Frequently asked questions
Related answers and guides
- Why One Project Has Several RERA Numbers
- Rent vs Buy Bangalore: How to Work It Out for Your Flat
- Before Property Registration in Bengaluru: 20 Checks
- RERA Karnataka Project Search: How to Check Any Project
Sources
- RBI loan-to-value limits: RBI Master Circular on housing finance.
- Stamp duty 5% (Schedule Art. 20(1)), first-sale flat slabs (Art. 20(2A)) and 10% cess (s.3B): Karnataka Stamp Act 1957, consolidated copy (DPAL); ₹ 35–45 L slab: Karnataka Stamp (Amendment) Act 2021.
- 2% surcharge on duty in the Greater Bengaluru Area: Greater Bengaluru Governance Act 2024, s.170.
- Registration fee 2%: IGR Karnataka, Table of Registration Fees (Notification RD/46/MNMU/2025) and IGR press note, 29 Aug 2025.
- Rates verified 18 Oct 2026 · confirm on Kaveri Online before registering.
- EMI: standard reducing-balance formula. EMI limit, buffer and fair value: your inputs.
Results are indicative and depend on the figures you enter. They are not loan approval or investment advice. For legal checks, consult a property lawyer.
Weighing up a Bengaluru property? Talk to an acre&key advisor.