Compliance due dates in June 2026

June: the first advance tax instalment, Form 16 and DPT-3

The first advance tax instalment falls on 15 June, covering the opening slice of the year's estimated liability. Estimating in June is genuinely hard for an early-stage company, but the instalments are cumulative, so an underpayment now can be made good at the next date — with interest running on the shortfall in the meantime.

Form 16 must be issued to employees by 15 June, which depends on the Q4 TDS return filed in May having been processed. DPT-3 lands at the end of the month, and it applies far more often than founders expect: it covers money received that is not treated as a deposit, which includes director loans and many founder advances.

What actually happens when you miss one — beyond the late fee

Founders under-rate compliance because they assume the worst case is a fee they can pay later. For the routine monthly filings that is broadly true. For several of these it is not, and the real consequences are structural rather than financial.

The amounts and rates are deliberately not stated here, because they change and because a number without its working is worth little. Where we can compute one, the calendar rows link a calculator that shows the arithmetic.

Losing your carried-forward losses — the expensive one for startups

Business losses may only be carried forward to set off against future profits if the return for the loss year was filed by the due date under Section 139(1). File late and, under Section 139(3) read with Section 80, that year's business loss is simply gone. A startup burning cash for four years is accumulating its single most valuable tax asset; a missed filing deadline destroys that year's slice of it, and there is no way to restore it later. Unabsorbed depreciation is treated differently, which is cold comfort.

Director disqualification

Under Section 164(2), a director of a company that has not filed its financial statements or annual returns for three consecutive financial years is disqualified — and the disqualification attaches to the person, barring them from being a director of ANY company, not merely the defaulting one. Founders discover this when they try to incorporate their next venture.

The company being struck off

The Registrar may strike a company off under Section 248 where it is not carrying on business or has not filed for a sustained period. Restoration means an application to the Tribunal — slow, costly, and fatal to any fundraise or acquisition in progress.

DIN deactivation

Miss DIR-3 KYC and the director's DIN is deactivated until it is filed with the prescribed fee. A deactivated DIN blocks that person from signing filings, which stalls everything else on this page.

Blocked GST filings and cancelled registration

Non-filing compounds: an unfiled GSTR-3B blocks the subsequent GSTR-1 under Rule 59(6), so one missed month freezes the next, and sustained non-filing is a ground for cancellation of registration under Section 29. Interest on the tax itself runs under Section 50 independently of any late fee.

Disallowed expenditure on unpaid TDS

Beyond interest under Section 201(1A) and the fee under Section 234E for late returns, failing to deduct or deposit TDS can cause the underlying expense to be disallowed under Section 40(a)(ia) — you lose the deduction on the payment itself, which usually costs more than the interest.

Advance tax interest

Under Sections 234B and 234C, interest runs on shortfalls in advance tax instalments. This one bites profitable companies that only think about tax at year end, and it accrues quietly across the four instalment dates.