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The total cost of buying a new apartment in Bengaluru is the negotiated consideration plus taxes, Karnataka conveyance charges, builder add-ons, financing and legal fees, and the cash needed to move in. A reliable estimate comes from your written offer, agreement, demand schedule and lender quotation—not from adding a standard percentage to a brochure price.
Build the calculation in separate lines, check the government assessment in Kaveri shortly before signing, and label refundable deposits and TDS separately. For planning only, a 2026 secondary Bengaluru example puts government charges at about 7.6% for an urban apartment above ₹45 lakh; your figure can differ with valuation, locality, tax status and the operative rates.
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What should be included in the total apartment cost?
Use this formula for the cash requirement:
All-in cash requirement = base consideration + GST + conveyance stamp duty + cess and surcharge + registration charges + builder extras + financing charges + legal/document fees + initial move-in costs + deposits due at booking or possession.
Then prepare two subtotals. The first is permanent or non-refundable purchase cost. The second is temporary cash tied up in refundable deposits. Track TDS as a payment allocation to the seller, not automatically as another amount added to the agreed price.
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| Line | What to enter | How to check it |
|---|---|---|
| Advertised or base price | Negotiated consideration in the written offer and agreement | Check what is excluded, every escalation clause and whether the quoted rate uses carpet, built-up or super-built-up area. |
| GST | The exact tax amount and basis on the promoter’s demand or invoice | Confirm whether the apartment is under construction, has an occupancy certificate, or falls within an eligible affordable-housing category. |
| Stamp duty | The property-specific amount assessed in Kaveri | Confirm the instrument, property category, first-sale eligibility and valuation basis. |
| Cess and surcharge | The amounts shown with the duty assessment | Use the local jurisdiction and the live Kaveri calculation rather than a generic online percentage. |
| Registration and minor registration charges | The sub-registrar or Kaveri estimate and receipt amount | A secondary Karnataka calculator checked on 26 October 2026 lists a 2% registration fee; verify the operative rate when you register. |
| Builder-billed items | Each item from the written builder cost sheet | Separate parking, amenities or club access, advance maintenance, corpus, society formation, legal/document charges, utility deposits and location or development charges. |
| Home-loan costs | The lender’s sanction and fee schedule | Include processing and applicable mortgage-related charges; do not confuse a lender fee with conveyance stamp duty. |
| Legal and document review | Your lawyer or document-writer quotation | Distinguish independent due diligence from government charges and promoter-collected legal fees. |
| Possession and move-in | Immediate interior, utility and setup estimates | Keep these outside statutory closing costs so you can see both registration cash and first-month cash. |
| Refundable or conditional sums | Deposit, refund conditions and expected refund date | Show the amount in cash required, but mark it separately from permanent cost. |
| TDS, if applicable | The amount withheld from the seller’s payment | Record it as withholding and remittance, not as an automatic extra charge on top of consideration. |
Ask the promoter to replace a single “other charges” number with this line-item schedule. A written schedule makes it possible to compare projects and identify charges that recur after possession.
How much are Karnataka stamp duty and registration charges?
For a qualifying conveyance, Karnataka’s general stamp-duty rate is 5% of the applicable value. The Karnataka Stamp Act provides lower first-sale flat or apartment slabs in the described category: 2% at or below ₹20 lakh and 3% above ₹20 lakh through ₹45 lakh. Above ₹45 lakh, the cited calculator applies the 5% slab. Eligibility depends on the instrument, property classification and the current schedule, so confirm your case in Kaveri.
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The Act refers to conveyance duty on the market value of the property. In practice, the assessment can use the higher of the consideration written in the document or the applicable market or guidance value. The Comptroller and Auditor General’s 2026 Karnataka report records historical errors in applying valuation instructions. That audit is not a live rate table, but it is a useful warning not to assume that the agreement price alone determines the assessment.
A secondary Karnataka calculator checked on 26 October 2026 lists a 2% registration fee, cess equal to 10% of stamp duty and a 2% surcharge on stamp duty. Those figures are planning inputs, not a guarantee of the amount payable for your flat. Run the property-specific calculation in Kaveri and retain the generated assessment and payment receipt.
Worked government-charge example for a ₹1.4 crore apartment
For an apartment valued at ₹1.4 crore within BBMP limits, a 2026 Bengaluru guide illustrates the following calculation:
- Stamp duty at 5%: ₹7,00,000
- Cess at 10% of duty: ₹70,000
- Surcharge at 2% of duty: ₹14,000
- Registration fee at 2%: ₹2,80,000
- Total illustrated government charges: ₹10,64,000, or about 7.6% of ₹1.4 crore
This is the source’s BBMP example, not an assessment for another locality or transaction. The guide’s assumptions, the valuation used by the registering authority and any change in the operative schedule can change the result. Use the published Bengaluru calculation as a way to understand the components, then replace every figure with your Kaveri assessment.
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How does GST change the amount payable?
Do not assume that every new apartment attracts the same GST. The Karnataka Commercial Taxes Department’s real-estate FAQ discusses effective 1% and 5% residential-project categories without input tax credit under the post-April 2019 framework, with eligibility conditions for affordable residential apartments.
The FAQ describes affordable-apartment conditions involving carpet area and a gross-amount threshold of ₹45 lakh. It also explains that promoter-collected amenity, society-formation, advance-maintenance and legal charges can count toward that threshold, while the FAQ text excludes statutory stamp duty and certain maintenance charges or deposits from that calculation. The document is transition-era guidance, so obtain the current tax treatment and the amount in writing rather than relying on a remembered rate.
Occupancy status is critical. A Bengaluru guide describes 0% GST for a ready-to-move unit with an occupancy certificate under its assumptions, and 5% or 1% categories for specified under-construction residential apartments. Treat that as a prompt to verify the occupancy certificate, the project’s tax classification and the invoice—not as a substitute for the current notification or professional tax advice.
Request a demand note that states the taxable base, rate, tax amount and whether each amenity or other promoter charge is included. If the project changes from under construction to completed status, ask the promoter how the tax treatment and remaining demands are affected.
Which builder charges are commonly outside the advertised price?
Before paying a booking amount, request a signed, itemized builder cost sheet. The advertised number may omit or separately bill:
- Reserved or covered parking;
- Clubhouse, amenity or facility access;
- Advance maintenance and a maintenance reserve or corpus;
- Society-formation or association charges;
- Legal, documentation or agreement-preparation charges;
- Electricity, water, gas, meter or other utility deposits and connection charges;
- Preferential-location, floor-rise or development charges; and
- Any one-time possession, handover or infrastructure charge.
For every line, ask four questions: Is it one-time or recurring? Is it refundable? When is it due—booking, agreement, registration, loan disbursement or possession? Is GST added, and is that tax already included in the quoted amount? The answers affect both your cash-flow calendar and the GST classification analysis.
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Do not let a salesperson’s verbal assurance replace the cost sheet and agreement. If an item is “included,” have the inclusion stated against the exact specification, quantity and tax treatment.
How should I add loan, legal and document costs?
Use the lender’s written sanction or fee schedule, not a generic loan percentage. Enter processing fees and any applicable mortgage-related charges, valuation or documentation fees, and other lender-disclosed amounts. Compare schedules on the same loan amount and note when each fee is payable. A lender charge is separate from stamp duty on the apartment conveyance.
Budget for an independent property lawyer or document reviewer if you choose one. Their quotation should identify title and encumbrance review, agreement review, approval checks and registration support separately. Keep that quotation distinct from a promoter’s “legal fee,” because the two services and recipients may differ.
For paperwork, retain the written offer, cost sheet, agreement, demand notices, GST invoices, Kaveri assessment, payment challans, loan sanction and receipts. A document folder makes later reconciliation possible if a demand changes or a refund is due.
How do deposits, TDS and move-in spending affect cash?
Refundable deposits can make the amount needed on a particular date larger without becoming a permanent purchase cost. Put each deposit in the cash-needed subtotal, then show its refund condition, trigger and expected date in a separate column. Examples include utility or maintenance deposits identified in the builder’s schedule.
TDS is different. Where the buyer has a withholding obligation, the withheld amount is generally part of the seller’s agreed payment that the buyer remits to the government. Record the gross consideration, the TDS withheld, the net amount paid to the seller and the remittance separately. Do not add TDS again as a new cost unless a tax professional confirms a different treatment for your transaction.
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Initial move-in spending belongs in a separate first-month budget: interiors, appliances, utility name changes or connections, basic repairs, moving services and immediate setup. These costs can be substantial, but combining them with statutory registration charges hides the amount required to complete the purchase itself.
What is the safest step-by-step calculation method?
- Fix the price basis. Write down the negotiated consideration, carpet area and the area basis used by the promoter. Record inclusions, exclusions and escalation clauses.
- Obtain the full builder schedule. Replace “other charges” with named amounts for parking, amenities, maintenance, corpus, society formation, legal work and utilities.
- Confirm GST in writing. Ask for the project’s tax category, taxable base, rate, invoice amount and the occupancy-certificate status relevant to your unit.
- Check valuation and duty. Enter the property details in Kaveri shortly before execution. Compare its assessed value with the agreement consideration and ask your conveyancing professional about any discrepancy.
- Add stamp duty, cess, surcharge and registration. Use the Kaveri assessment and current receipt estimate. Keep the secondary 2% registration figure and 7.6% illustration only as planning references.
- Collect lender and legal quotations. Add each disclosed fee once, with its due date and whether it is refundable.
- Build the cash calendar. Show amounts due at booking, agreement, registration, loan disbursement and possession. Include deposits due at each stage.
- Separate the subtotals. Present permanent purchase cost, refundable cash temporarily tied up, and move-in cash. Track TDS as withholding and remittance.
- Reconcile before payment. Match every demand to the agreement, tax invoice, Kaveri assessment or lender schedule. Do not pay an unexplained balance merely because it appears on a final statement.
How can I compare two Bengaluru apartments fairly?
Compare both projects using the same area basis and the same payment stage. A lower quoted price per square foot can disappear once GST status, government valuation, parking, maintenance deposits or possession charges are included.
| Comparison axis | What to place side by side |
|---|---|
| Base consideration | Negotiated price for the same area definition; show carpet area separately from super-built-up area. |
| Tax status | GST category, invoice amount, occupancy-certificate status and treatment of promoter charges. |
| Government charges | Kaveri-assessed value, stamp duty, cess, surcharge and registration estimate for each property. |
| Builder extras | Parking, amenities, advance maintenance, corpus, society formation, utilities and location or development charges. |
| Timing and refundability | Amount due at booking, registration and possession, and which deposits can be recovered. |
| Finance and legal | Lender fees, mortgage-related charges and independent document-review fees. |
| Total cash | Cash required before booking, at registration and at possession, plus the first-month setup budget. |
The Stamp Act treats an apartment conveyance as including the buyer’s undivided interest in land and proportionate common areas, but marketing labels still need to be checked against each agreement. Never divide one project’s price by super-built-up area and another’s by carpet area and call the result comparable.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What mistakes cause buyers to under-budget?
- Using a single percentage for every project: Fix it by calculating each statutory and contractual line separately.
- Assuming the agreement price always controls duty: Check the higher applicable consideration or market-value assessment in Kaveri.
- Applying one GST rate to all new apartments: Verify construction status, occupancy certificate, project category and the current invoice basis.
- Accepting an unexplained “other charges” total: Demand a written line-item schedule and tax treatment.
- Mixing refundable deposits with permanent cost: Show both in the cash requirement, but separate them in the ownership-cost subtotal.
- Counting TDS twice: Reconcile gross consideration, withholding, net seller payment and government remittance.
- Forgetting timing: A buyer can afford the all-in total but still miss a booking or registration instalment. Build a dated cash-flow schedule.
- Using an old calculator result: Refresh the Kaveri estimate immediately before execution and on the actual registration date if the transaction is delayed.
What should the final worksheet look like?
For each apartment, put the negotiated consideration at the top, followed by GST, Kaveri stamp duty, cess, surcharge and registration. Add every builder, lender and legal line, then add the initial move-in estimate and deposits. Beneath that, show:
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- Temporary cash tied up: refundable deposits and other conditional sums, with the refund trigger and expected date.
- First-month cash: interiors, utilities, moving and immediate setup.
- TDS reconciliation: gross seller consideration, withholding, net seller payment and remittance reference.
Sign and date the version used for approval, and update it whenever the promoter issues a revised demand, the lender changes its schedule or the registration date moves.
Why should Kaveri be checked immediately before registration?
Online calculators are useful for planning, but they cannot replace the property-specific government assessment. The calculator source itself describes its result as an estimate and directs users to the exact amount shown in Kaveri before payment. Rates, guidance values, jurisdiction and classification can change, and the CAG’s audit shows why valuation instructions should be checked rather than assumed.
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Refresh the estimate close to execution, verify the challan and receipt, and ask your lawyer or document writer to reconcile the government amount with the instrument. Keep the final Kaveri output with the agreement and payment records.
Frequently Asked Questions
When should I refresh my Bengaluru apartment cost estimate?
Refresh it when the agreement or demand schedule changes, shortly before execution, and again if registration is postponed. The live Kaveri assessment and the promoter’s current tax invoice matter more than an older calculator printout.
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What proof should I request for the GST amount?
Ask for a written demand or tax invoice showing the taxable base, applicable rate, GST amount and the project or unit’s occupancy status. Keep the promoter’s explanation with the agreement so a later demand can be reconciled.
Can two flats with the same advertised price have different government charges?
Yes. The assessed market or guidance value, locality, property classification and eligibility for any reduced slab can differ. Compare each unit using its own Kaveri assessment rather than copying the first project’s percentage.
Why should carpet area and super-built-up area be shown separately?
A quoted rate is meaningful only when both apartments use the same area basis. Showing carpet area separately also helps you understand how much usable space you receive for the total cash outlay.
