Selling a Flat in Bangalore? Advance Tax on the Gain, Date by Date

Registering a sale deed starts a tax clock, and how the seller handles the next few months decides whether interest is added. Plenty of owners keep the whole sum aside until the return is being prepared. By then a charge of 1% a month may already be running. This piece covers the Rs. 10,000 trigger, the instalment calendar, the clause that protects mid-year sellers, and a costed example for a flat in Bangalore.

The Cost of Waiting: One Flat, Two Outcomes

Picture a salaried seller whose Rs. 1.5 Crore flat deed is signed and registered on 10 October 2026. After exemptions, the long-term profit is Rs. 30 Lakhs. A 12.5% rate gives Rs. 3.75 Lakhs, and the 4% cess lifts the bill to Rs. 3.90 Lakhs.

The purchaser has already remitted 1% of the price, or Rs. 1.5 Lakhs, to the department. The seller therefore owes Rs. 2.40 Lakhs more. Paid on or before 15 December 2026, that closes the matter with zero interest.

Now imagine the seller holds off and pays in July 2027 with the return. The December shortfall costs Rs. 5,400 and the March shortfall Rs. 2,400. Another Rs. 9,600 accrues from April through July, so the delay costs roughly Rs. 17,400.

Who Falls Under the Rule

Look at the projected liability for the entire year, and subtract anything already deducted at source. If what remains reaches Rs. 10,000, paying in instalments is compulsory. Salary, rent, deposit interest, business profit and the property profit are all pooled for this test, so a single sale nearly always qualifies.

Resident seniors aged 60 and above are excused, provided they earn nothing from a business or profession. They simply remit the amount as self-assessment tax ahead of filing, and no instalment interest applies to them.

For income from 1 April 2026, the 2025 Income-tax Act covers this in sections 403 through 408. The older Act's limit, dates and percentages continue as before. Only the numbering moved.

Working Out the Amount

The holding period sets the rate. Beyond 24 months, a resident's profit is long-term and attracts 12.5% with no indexation. Individuals and HUFs whose purchase predates 23 July 2024 may elect 20% on an indexed figure if it comes out lower. At 24 months or fewer, the profit is short-term and follows the normal slab.

These items reduce what must be paid in instalments.

• Exemptions the seller expects to claim, for example through a new home or specified bonds
• The 1% held back by the purchaser on a price of Rs. 50 Lakhs and above
• Deductions already made from salary or other earnings

Cess of 4% is extra, and higher incomes face a surcharge as well. Money earmarked for reinvestment may be excluded up front. Should that plan collapse, the levy on the excluded part becomes payable along with interest.

Payment Calendar for 2026-27

Each deadline carries a running percentage of the year's liability, not a fresh slice.

• June 2026 (15th): 15% paid in total
• September 2026 (15th): 45%
• December 2026 (15th): 75%
• March 2027 (15th): the full 100%

Remittances made until 31 March are accepted as instalments. After that, they turn into self-assessment tax and interest begins.

The Clause That Shields Mid-Year Sellers

Nobody can predict in April which month a deed will be registered. Under the 2025 Act's section 425 (234C in the older law), the department therefore forgives the interest on past instalments whenever a capital gain created the gap. The seller must settle the entire amount due on that profit in the instalments still left, or by 31 March when no instalment remains.

In practice, the target is the first deadline after registration. Transfer happens on the day the deed is registered in most cases, and a token advance under an agreement does not trigger it.

• Deed dated April 1 to June 15: pay by June 15, and by March 15 at the very latest
• Deed dated June 16 to September 15: pay by September 15, with March 15 as the outer limit
• Deed dated September 16 to December 15: pay by December 15, with March 15 as the outer limit
• Deed dated December 16 to March 15: pay on or before March 15
• Deed dated March 16 to March 31: pay before the year closes on March 31

How Interest Is Counted

Two levies, each at simple 1% per month with part-months rounded up, can be charged together.

For a missed instalment

Under section 425, a gap at the June, September or December milestone draws three months of interest, while a gap in March draws one. Having paid 12% and 36% at the first two milestones is regarded as adequate.

For finishing the year below 90%

Section 424, formerly 234B, bites when payments by 31 March cover under 90% of the year's liability. Interest accrues on the unpaid portion from 1 April to the date of payment.

Paying, and the Position of NRIs

The e-Pay Tax facility on the income tax portal handles it. Choose the advance tax option, select the assessment year, pay by net banking, a card or UPI, and download the challan. The entry reaches the annual information statement within days.

A non-resident seller meets higher withholding at the buyer's end, and that often absorbs the whole liability. Instalments are needed only for what remains. Owners abroad can write to our NRI desk for help with the sale paperwork.

Steps to Follow After You Agree a Sale

A short sequence keeps the payment on schedule.

1. Estimate the profit before the registration date is fixed
2. Exclude only reinvestments that will really happen
3. Verify that the purchaser's 1% shows up in Form 26AS or the annual information statement
4. Pay the balance by the first deadline after the deed date
5. Store the challan, deed and reinvestment papers with the return documents
6. Where an exemption is still planned, deposit the unspent gain under the Capital Gains Account Scheme before the filing deadline

Large profits, joint holdings and non-resident sellers justify a chartered accountant's review. The fee is trivial compared with a year of interest.