Advance Tax Due Dates 2026: How to Avoid 234B & 234C Interest

Every year around March 15th, my inbox fills up with the same panicked message: "Sir, my CA says I owe ₹40,000 in advance tax by tomorrow. What happens if I miss it?" The answer is rarely dramatic — the tax department won't come knocking — but the slow bleed of penal interest under Sections 234B and 234C catches thousands of freelancers, consultants, F&O traders and dividend earners off guard every single year.

Here's a number that surprises most people: interest under Section 234B and 234C runs at 1% per month — that's an effective 12% annually, compounded on your shortfall. If you owe ₹1,00,000 in tax and pay it a year late, you can easily hand over ₹10,000–₹15,000 in pure interest. That's money you could have parked in a decent FD or SIP instead.

In this guide I'll walk you through the advance tax due dates 2026, explain exactly how the four quarterly instalments work, show you a fully worked example so you can compute your own liability, and give you a concrete checklist to dodge 234B and 234C interest entirely. No jargon, no fluff — just what a working professional or investor actually needs to do.

Key Takeaways

• You must pay advance tax if your total tax liability (after TDS) exceeds ₹10,000 in a financial year.
• There are four instalments: due on 15 June, 15 September, 15 December and 15 March.
• Section 234C charges interest for missing or underpaying a quarterly instalment; Section 234B charges interest if you paid less than 90% of your total tax by year-end.
• Both attract 1% simple interest per month — pay on time and you owe nothing extra.
• Salaried employees whose TDS covers everything usually don't worry, but side income, capital gains, dividends and interest can push you into advance tax territory.
• Senior citizens (60+) with no business income are fully exempt from advance tax.

What is advance tax and who actually has to pay it?

Advance tax is exactly what it sounds like — paying your income tax in instalments during the financial year rather than in one lump sum at the end. The government calls it "pay as you earn." It applies to income that doesn't already have tax deducted at source, or where the TDS isn't enough to cover your full liability.

The trigger is simple. If your estimated total tax for the year, minus TDS/TCS already deducted, is more than ₹10,000, you're liable to pay advance tax. This threshold catches a lot more people than they realise:

• Freelancers and consultants — a graphic designer, developer or content writer billing clients directly, often with only 10% TDS deducted under Section 194J.
• Professionals — doctors, lawyers, architects running their own practice.
• Investors and traders — anyone with sizeable capital gains, F&O income, or dividend income (dividends now have no DDT and are fully taxable in your hands).
• Landlords earning rental income above the TDS threshold.
• Salaried employees with side income — your employer's TDS only covers your salary, not your ₹3 lakh of stock market gains or your moonlighting income.

Who is exempt? A resident senior citizen (aged 60 or above) who has no income from business or profession does not have to pay advance tax at all. They can settle everything as self-assessment tax while filing the return.

Advance tax due dates 2026: the four instalments explained

For financial year 2025-26 (assessment year 2026-27), the due dates and the cumulative percentage of your total tax you must have paid by each date are fixed. Here they are:

Instalment	Due Date	Cumulative % of Total Tax Payable
1st	15 June 2025	15%
2nd	15 September 2025	45%
3rd	15 December 2025	75%
4th	15 March 2026	100%

Notice the percentages are cumulative, not per-quarter. By 15 September you should have paid a total of 45% (not just 30% for that quarter). This trips people up constantly.

There's a special rule for taxpayers under the presumptive taxation scheme (Sections 44AD and 44ADA — used by many small businesses and professionals with gross receipts under the prescribed limits). They get a break: the entire advance tax can be paid in a single instalment by 15 March 2026. If you're a freelancer declaring income under 44ADA, this simplifies your life considerably.

Pro tip: Any advance tax paid on or before 31 March 2026 is still treated as advance tax for the year — not self-assessment tax. So if you missed the 15 March deadline by a week, paying by month-end still limits your 234B exposure. Don't wait until you file the return in July.

How are Section 234B and 234C interest actually calculated?

These two sections are separate and can both apply at the same time. Understanding the difference is the whole game.

Section 234C — interest for deferment of instalments

This is the "missed a deadline" penalty. If you don't pay the required cumulative percentage by each due date, you pay 1% per month (simple interest) on the shortfall, for a fixed period:

• Shortfall at 15 June → interest for 3 months
• Shortfall at 15 September → interest for 3 months
• Shortfall at 15 December → interest for 3 months
• Shortfall at 15 March → interest for 1 month

There's built-in leniency: for the June and September instalments, you won't be charged 234C if you've paid at least 12% and 36% respectively (instead of the full 15% and 45%). This cushion exists because estimating income early in the year is genuinely hard.

Section 234B — interest for default in payment

This kicks in if, by 31 March, you've paid less than 90% of your total assessed tax. You then pay 1% per month on the shortfall from 1 April until the date you actually pay (usually when you file your return). Because it runs month after month, 234B is the one that really adds up if you drag your feet.

A fully worked example: Priya the freelance designer

Let's make this concrete. Priya is a freelance UI/UX designer in Pune. For FY 2025-26 she estimates:

• Professional income: ₹18,00,000
• She opts for the presumptive scheme under 44ADA — but for this example, assume she's under normal provisions to show the quarterly mechanics.
• Her clients deducted TDS of ₹1,20,000 under Section 194J across the year.

Using the new tax regime for FY 2025-26 and after her deductions, suppose her total tax liability (including cess) works out to ₹2,00,000. You can verify your own figure quickly with our Income Tax Calculator.

Net advance tax payable = ₹2,00,000 − ₹1,20,000 TDS = ₹80,000.

Since ₹80,000 exceeds ₹10,000, Priya must pay advance tax. Here's her instalment schedule:

Due Date	Cumulative %	Cumulative Amount	Instalment Due This Quarter
15 Jun 2025	15%	₹12,000	₹12,000
15 Sep 2025	45%	₹36,000	₹24,000
15 Dec 2025	75%	₹60,000	₹24,000
15 Mar 2026	100%	₹80,000	₹20,000

Now the mistake: Priya, like many freelancers, ignores advance tax entirely and plans to pay ₹80,000 when she files her return in July 2026. What does she pay in interest?

Section 234C — she missed all four instalments:

• June shortfall ₹12,000 × 1% × 3 months = ₹360
• September shortfall ₹36,000 × 1% × 3 months = ₹1,080
• December shortfall ₹60,000 × 1% × 3 months = ₹1,800
• March shortfall ₹80,000 × 1% × 1 month = ₹800
• Total 234C ≈ ₹4,040

Section 234B — she paid ₹0 of advance tax against a required 90% (₹72,000). She files in, say, July 2026, so interest runs for 4 months (April to July):

• ₹80,000 × 1% × 4 months = ₹3,200

Total avoidable interest ≈ ₹7,240. That's a real number Priya is paying purely for procrastination. Pay the four instalments on time and it drops to zero.

How to pay advance tax online: step-by-step

Paying advance tax is genuinely a five-minute job on the income tax portal. Here's the exact walkthrough:

1. Go to the Income Tax e-filing portal (incometax.gov.in) and navigate to e-Pay Tax. You don't even need to log in for this.
2. Enter your PAN and mobile number; verify with the OTP.
3. Select Assessment Year 2026-27 and choose the type of payment as "Advance Tax (100)". This code matters — picking the wrong one misclassifies your payment.
4. Enter the tax amount under the correct heads (tax, surcharge, cess). If unsure, put the whole figure under "Tax."
5. Choose your payment mode — net banking, debit card, UPI, or pay at an authorised bank via challan.
6. Complete the payment. You'll get Challan 280 (now generated as a CRN receipt). Download and save it.
7. Check that the payment reflects in your Form 26AS / AIS within a few days. This is your proof and it auto-populates when you file your return.

Common mistake: Selecting the wrong assessment year. For FY 2025-26, the correct AY is 2026-27. Every year people pay against the wrong AY, then spend weeks chasing a rectification. Double-check that dropdown before you hit pay.

Old regime vs new regime: how it changes your advance tax

Your choice of tax regime directly affects your total liability, which is the base for every advance tax calculation. Under the new regime for FY 2025-26, the rebate under Section 87A means income up to ₹12 lakh (for those without special-rate income like capital gains) effectively pays zero tax. That can wipe out your advance tax obligation entirely.

Here's a rough comparison of tax outgo across income levels (new regime, individual, before cess, illustrative):

Total Income	New Regime Tax (approx)	Advance Tax Required?
₹8,00,000	₹0 (rebate)	No
₹12,00,000	₹0 (rebate)	No, if no TDS shortfall
₹18,00,000	~₹1,60,000	Yes, if TDS < 90%
₹30,00,000	~₹5,40,000	Yes

The catch for investors: capital gains and dividends don't get the 87A rebate the same way, and special-rate income (like 15% short-term equity gains or the 30% flat crypto tax) is always taxable. So even if your salary is under ₹12 lakh, a big equity or crypto windfall can create a fresh advance tax liability. If you trade digital assets, read our detailed breakdown of the crypto tax in India 2026 before you estimate your instalments.

How investors and traders should handle unpredictable capital gains

The trickiest part of advance tax is estimating income you haven't earned yet. Nobody knows in June how much they'll make in F&O or from selling stocks by March. The Income Tax Act builds in relief for this.

For capital gains, lottery/casual income, and dividend income, if the income arises after an instalment due date, you're not penalised under 234C for that quarter — provided you pay the tax on it in the remaining instalments, or by 31 March.

Practical rule: whenever you book a large gain — say you sell mutual fund units for a ₹5 lakh long-term gain in November — calculate the tax on it immediately and add it to your December instalment. Don't wait for March. Use our Income Tax Calculator to model the extra liability, and if the gains came from equity SIPs, our SIP Calculator helps you see your invested-vs-gain split at a glance.

If you hold US stocks or foreign assets, remember the reporting is separate and strict — our guide on reporting foreign assets in your ITR covers the Schedule FA requirements that trip up so many investors.

A practical checklist to never pay 234B or 234C interest again

1. Estimate your annual income in April. Rough is fine — you'll refine it each quarter.
2. Compute total tax and subtract expected TDS. If the gap exceeds ₹10,000, you're in advance-tax territory.
3. Set four calendar reminders: 15 June, 15 September, 15 December, 15 March.
4. Pay the cumulative percentage each quarter — 15%, 45%, 75%, 100%.
5. Re-estimate after every windfall — bonus, capital gain, new client. Adjust the next instalment upward.
6. Ensure 90% is paid by 15 March to fully escape 234B.
7. Save every challan and reconcile with your AIS before filing.

If you're a salaried professional trying to work out your take-home and side-income tax together, our Salary In-Hand Calculator and HRA Exemption Calculator make the salary side quick, and you can explore the full suite on our free calculators page. For those juggling a home loan alongside HRA, our piece on whether you can claim HRA and home loan benefits together is worth a read.

Frequently Asked Questions

What are the advance tax due dates for FY 2025-26?

The four instalments are due on 15 June 2025 (15%), 15 September 2025 (45%), 15 December 2025 (75%) and 15 March 2026 (100%). Taxpayers under the presumptive scheme (44AD/44ADA) can pay 100% in a single instalment by 15 March 2026.

What is the difference between Section 234B and 234C?

Section 234C penalises you for missing or underpaying a specific quarterly instalment (interest for 1–3 months on the shortfall). Section 234B penalises you if less than 90% of your total tax is paid by 31 March, charging 1% per month from 1 April until you actually pay. Both can apply simultaneously.

Do salaried employees need to pay advance tax?

Usually not, because their employer deducts TDS on salary. But if you have significant income outside salary — capital gains, dividends, interest, rent or freelance income — where TDS doesn't cover the full liability, you may owe advance tax if the shortfall exceeds ₹10,000.

What happens if I pay advance tax after 15 March but before 31 March?

Any tax paid up to 31 March is still treated as advance tax. You may owe a little 234C interest for the March instalment, but you can avoid or minimise 234B by ensuring at least 90% of your total tax is paid before the financial year ends.

How is advance tax interest calculated on capital gains?

If capital gains arise after an instalment due date, no 234C interest applies for the earlier quarters. You must include the tax on those gains in the next instalment falling due, or pay it by 31 March, to stay penalty-free.

Is there any exemption from advance tax?

Yes. Resident senior citizens aged 60 or above who have no income from business or profession are fully exempt from advance tax. They can settle their liability as self-assessment tax at the time of filing.

Can I get a refund if I pay too much advance tax?

Absolutely. If your advance tax and TDS together exceed your final liability, the excess is refunded when you file your return, along with interest under Section 244A. Overpaying slightly is far safer than underpaying and facing 234B/234C interest.

The bottom line

Advance tax isn't complicated once you internalise one idea: the government wants its money as you earn it, in four predictable slices. Miss those slices and 234B/234C interest quietly erodes your savings at 12% a year — a cost that's completely self-inflicted and completely avoidable.

Mark the advance tax due dates 2026 in your calendar today, estimate your liability in April, top it up after every bonus or capital gain, and reconcile your challans before filing. Do that, and you'll never pay a rupee of penal interest. Run your numbers through our Income Tax Calculator and the wider set of AlarmDaddy tools to make each instalment precise. Have a tricky situation — mixed income, foreign shares, presumptive taxation? Reach out to us or learn more about AlarmDaddy and how we help Indians make sharper money decisions.