Advance Tax
Second instalment missed last year, interest
2025-11-24 · updated 2026-09-06
Matching tool: Advance tax shortfall
I missed 15 September last year. Not the shop. Me. Freelance billing for two traders plus my clerk work. I paid June like a good boy. September I was in Udaipur for a wedding. I told myself 15 December will cover it.
15 December covered some. It did not erase September.
When I filed ITR, interest line sat there. Small. Ugly. I had no story that made it zero.
Second instalment in the usual talk is the 15 September cut. People say 45 percent of the year tax should be in by then. June is 15 percent. September makes it 45. December 75. March 100. I treat those as typical pattern. Official date can sit on a holiday and move. I dont treat a blog as law.
If you want a rupee guess on what is still short, open Advance tax shortfall on PayByDate. Put tax for the year. Put what you already paid. Put the instalment you missed. Read the number. This is an estimate. Confirm on the official portal.
What “second instalment” is when owner calls me
Owner says “second” and I ask which calendar he is holding. Some count April as first. Department count I use is June, September, December, March.
So second is September. 15th in the usual year. 45 percent cumulative.
If you missed June and you are asking about September, that is a different pile. September still wants the 45, not only the extra 30. I wrote that pile here: Missed June instalment, what happens in September.
If you paid some but not enough, you are not clean. Partial is common. See I paid some advance tax already.
If you only have salary and TDS is fat, maybe you never needed this instalment. Maybe you did if FD and tuition sit on top. See Salary only, do I still pay advance tax.
I tell them on phone. Interest for shortfall is not late fee like ITR. Different meter. It runs on how short you were and for how long.
I dont recite section numbers to sound tall. I say unpaid advance has a cost. Portal will compute when you file if you fill the pages right.
What I felt when the interest showed
I was angry at myself. Then I tried to hide it by putting a wrong paid amount. Then I stopped. Wrong paid amount is how a notice comes.
I opened last year challans. June was there. September was empty. December was fat because I panicked. March I paid a leftover.
Interest still looked at the hole in September. Paying extra later helps the later period. It does not time-travel.
A furniture shop on Tonk Road did the same. They dumped money in March and thought September ghost is gone. Ghost stayed in the computation.
I ran Advance tax shortfall only to see the shape. Tool and ITR utility can differ by hundreds. Both can be honest. I still paid what portal asked.
45 percent talk I keep on a separate card: Advance tax 15 September, how much is the 45 percent cut. I read it again this year so I dont repeat my wedding mistake.
TDS I did reduce. Client cut 10 percent on a bill. I dont want to pay that slice twice. See TDS deducted, do I reduce it from advance tax.
How I live with a missed September now
I do not wait for ITR week to discover the hole.
I keep a paper in July. Year tax guess. June paid. What September wants. What cash I have in first week of September.
If cash is thin, I still pay something. Something is not always enough. Enough is the 45 percent line minus TDS minus what June already did. I check with the shortfall tool. Pencil. Then challan on the official site.
First time challan people ask which box. I send them here: First time advance tax, which box. Wrong code is a later cleanup.
If I already missed last year, this year I set a reminder on two phones. Shop phone and home phone. Jio can lose a reminder. Two is better.
I also stop treating December as a washing machine. December has its own 75 percent. It is not a confession box for September.
Freelancer with 9 lakh mood has the same calendar. See Advance tax for freelancer 9 lakh. Amount changes. Dates dont become soft.
Mistakes I hear after someone missed it
“I will pay interest next year and forget.” Interest is computed in this return. You pay it with this return or you carry a mess.
“My CA will remove it.” CA can check if you truly had no liability. CA cannot delete a real shortfall because you were at a wedding.
“September 15 was Sunday so I am safe if I pay Monday.” Sometimes due moves. Sometimes you still needed a plan on Friday. I pay on 13th when I can.
“GST 3B I paid so income tax advance is same.” Different. GST cash ledger is not advance tax challan.
“I missed last year so I should not pay this year.” Opposite. This year still has cuts.
I also see people file ITR late and then mix ITR late fee with advance interest. Two lines. Fee estimator is here: ITR late fee estimator. Shortfall tool is the other.
If a notice comes after filing, I dont open PDF on shop wifi in a rush. First check list is here: Notice after filing.
What I keep so this September does not repeat
Diary page titled “45”. Year estimate. TDS already. June challan number. September target. Bank balance week of 10th.
I estimate tax again in August. Shop profit moves. Freelance moves. Old estimate from April is a lie by then.
I use Advance tax calculator for the year shape. Then shortfall tool if I already paid uneven. Then official challan.
I tell the owner. Missing second instalment last year is done. Interest last year you pay when you file that year. This year is a new scoreboard.
First time people still ask which box. I send them here so they dont copy a WhatsApp code: First time advance tax, which box.
I am not the department. PayByDate is a helper. Official e-pay and ITR utility win. If they change the percent pattern in a budget, I will still tell you to read the live page.
Pay the September cut when you can. If you already missed, pay now and keep the challan. Dont wait for another wedding.
This is an estimate. Confirm on the official portal.