The 13th IFF Cut-Off: How QRMP Taxpayers Keep B2B Credit Flowing Between Quarters

If you run a business on the QRMP scheme, 13 June 2026 is not a date you can let slide. The Invoice Furnishing Facility (IFF) for May 2026 — the second month (M2) of the April-June 2026 quarter — closes at the end of the day. Miss it, and the business-to-business (B2B) invoices you raised in May cannot pass input tax credit (ITC) to your buyers until your quarterly GSTR-1 lands in July. For your customers, that is a one-month working-capital gap on every rupee of tax they hoped to claim. With the RBI repo rate held at 5.25% (RBI Monetary Policy Committee, 8 April 2026), the carrying cost of a stranded credit is not trivial.

The Quarterly Return Monthly Payment (QRMP) scheme lets taxpayers with aggregate turnover up to Rs 5 crore file GSTR-1 and GSTR-3B once a quarter while paying tax monthly. The trade-off is that B2B credit no longer flows automatically every month — unless you use the IFF window on the 13th. This watchlist explains exactly what is due on 13 June 2026, what is not, and how to keep your recipients' credit pipeline unbroken into the new quarter.

Statutory Deadlines

The single hard deadline for 13 June 2026 is the IFF for May 2026. Under Rule 59(2) of the Central Goods and Services Tax (CGST) Rules, 2017, a QRMP taxpayer may furnish B2B invoice details for the first two months of a quarter (April and May, in this case) by the 13th of the succeeding month. The May filing therefore expires at 23:59 on 13 June 2026. The facility covers GSTR-1 tables 4A, 4B and 4C (B2B supplies) and 6B and 6C (supplies to and from special economic zones and deemed exports). The cumulative invoice value uploaded through IFF in any single month cannot exceed Rs 50 lakh.

The word "expires" is deliberate. IFF is optional, but it is not a deferral — if you do not file the May invoices by 13 June 2026, that window simply lapses. Those invoices must then wait for the quarterly GSTR-1 of the April-June quarter, which is due in July 2026. Your recipient's ITC for a May purchase consequently does not appear in their GSTR-2B until the July reporting cycle, delaying their claim by a full month.

Three other GST filings share the 13th-of-the-month cadence and are therefore due on 13 June 2026 for the May 2026 period: GSTR-6 for Input Service Distributors (ISD), GSTR-5 for non-resident taxable persons, and GSTR-5A for OIDAR (online information and database access or retrieval) service providers. ISD registrants in particular should not overlook this date, because the ISD mechanism became mandatory for distributing common ITC across branches from 1 April 2025.

Looking just two days ahead, the first instalment of advance tax for FY 2026-27 falls due on 15 June 2026. Any taxpayer whose total liability for the year is expected to exceed Rs 10,000 must deposit 15% of the estimated tax by that date (Section 208 and Section 211, Income-tax Act, 1961). Businesses closing their May GST books this week should fold that 15 June outflow into the same cash-flow plan. You can model the four instalments using the Oquilia advance tax calculator, and our advance tax glossary entry lays out the quarterly percentages in plain terms.

Market Events

There is no scheduled central-bank or securities-market event of note for 13 June 2026 — the date's significance is regulatory and tax-compliance driven, not price driven. The backdrop, however, matters for how a QRMP business should think about the IFF deadline. The RBI repo rate stands at 5.25% following the Monetary Policy Committee's unanimous hold on 8 April 2026, the second consecutive pause after the February 2026 decision (RBI, rbi.org.in). The Standing Deposit Facility rate is 5.00% and the Marginal Standing Facility rate is 5.50%.

Why does the policy rate belong in a discussion about an invoice deadline? Because a delayed IFF effectively lends your buyer's tax credit back to the government for a month. If a recipient cannot claim, say, Rs 5 lakh of ITC in May and must instead fund that GST outflow from a cash credit line priced off the External Benchmark Lending Rate, the one-month interest cost is real money. At marginal borrowing rates that today sit several points above the 5.25% repo, a habitual late-IFF supplier quietly becomes an expensive supplier to deal with. Procurement teams at larger buyers increasingly track which vendors file IFF on time, because predictable monthly credit improves their own GSTR-2B reconciliation.

For the broader trading calendar, mid-June 2026 sits between the close of the Q4 FY2025-26 results season and the start of Q1 FY2026-27 reporting. The compliance cycle, rather than corporate news flow, is what drives treasury desks at small and mid-sized enterprises this week. Working capital freed up by clean, on-time credit pass-through is capital that can be redeployed — a disciplined business might route a predictable monthly surplus into a systematic plan using the Oquilia SIP calculator rather than leaving it idle in a current account.

Earnings

No major listed-company results are confirmed on the calendar for 13 June 2026, and in keeping with our zero-hallucination policy we will not list any that are not scheduled. The 13th of any month is a GST filing date, not an exchange-mandated disclosure date, and mid-June falls in the quiet window after annual and Q4 audited results have been published and before the first-quarter numbers begin in earnest from mid-July.

That said, the IFF discipline this watchlist describes has a direct line to reported earnings further down the chain. For any company that depends on a long tail of QRMP-registered vendors, timely IFF filing reduces ITC mismatches, lowers the volume of credit reversals under Rule 37 (reversal where consideration is unpaid within 180 days), and tightens the working-capital cycle that ultimately shows up in cash-flow statements. Treasury and tax teams that reconcile GSTR-2B against the purchase register every month treat the 13th as a checkpoint precisely because the alternative — waiting for a vendor's quarterly GSTR-1 — distorts the monthly ITC run-rate.

The table below sets out the full QRMP compliance rhythm for the April-June 2026 quarter, so a finance team can see where 13 June 2026 sits in the sequence.

PMT-06 is the monthly challan QRMP taxpayers use to pay tax for the first two months of a quarter, due by the 25th, using either the fixed-sum method (35% of the previous period's cash payment) or the self-assessment method. For a fuller walkthrough of the quarterly return mechanics and the 22nd-versus-24th GSTR-3B split, see our companion piece, QRMP Scheme Decoded. You can also sanity-check the tax in your invoices with the Oquilia GST calculator before you upload them to the IFF.

FAQ

What exactly happens if I miss the IFF deadline on 13 June 2026?

The IFF window for May 2026 lapses. There is no late fee for missing IFF itself, because it is an optional facility under Rule 59(2) of the CGST Rules, 2017. The cost is indirect: your May B2B invoices will only be reported in the quarterly GSTR-1 of the April-June quarter, filed in July 2026, so your buyers' input tax credit for those purchases is delayed by roughly a month. There is no way to file a "late IFF" for May after 13 June 2026 — the invoices simply roll into the quarterly return.

Who can use the Invoice Furnishing Facility?

Only taxpayers enrolled in the QRMP scheme, which is open to registered persons with aggregate annual turnover up to Rs 5 crore who opt to file GSTR-1 and GSTR-3B quarterly. IFF is available for the first two months of each quarter (M1 and M2) and is capped at a cumulative invoice value of Rs 50 lakh per month. In the third month of the quarter there is no IFF — those invoices go directly into the quarterly GSTR-1.

Is there any tax to pay along with the IFF?

No. The IFF only furnishes invoice details so that ITC can flow to recipients; it does not carry a tax payment. Tax for the first two months of the quarter is paid separately through Form PMT-06 by the 25th of the following month — so for May 2026, the PMT-06 challan is due by 25 June 2026. The actual return-and-pay reconciliation happens in the quarterly GSTR-3B.

Which invoice types can I upload through the IFF?

The IFF accepts the B2B details that populate GSTR-1 tables 4A, 4B and 4C, plus tables 6B and 6C covering supplies to special economic zones and deemed exports. Business-to-consumer (B2C) invoices, advances, and amendments are not part of IFF — those are reported in the quarterly GSTR-1. This is why IFF is described as a credit-flow facility rather than a full return.

Does using IFF change my advance tax or income-tax dates?

No. IFF is a GST compliance step and is entirely separate from income tax. Your advance-tax obligations follow the Income-tax Act, 1961 schedule: 15% by 15 June, 45% by 15 September, 75% by 15 December and 100% by 15 March (Sections 208 and 211). The proximity of the 13 June IFF deadline and the 15 June advance-tax instalment is a calendar coincidence, but it is a useful prompt to review both at once. Use the advance tax calculator to estimate the June instalment.

How does timely IFF affect my buyer's GSTR-2B?

When you file the May 2026 IFF by 13 June 2026, the invoices flow into your recipient's auto-drafted GSTR-2B for the May tax period, letting them claim the ITC in that month rather than waiting for your quarterly GSTR-1 in July. Reliable monthly IFF filing therefore makes you an easier vendor to reconcile with, which matters to procurement teams that match GSTR-2B against their purchase register every month.

Where can I confirm the official IFF rules?

The governing provision is Rule 59(2) of the CGST Rules, 2017, available through the India Code repository (indiacode.nic.in), and the GST Network publishes a step-by-step IFF FAQ on the GST portal. For the underlying tax-payment and return obligations of the QRMP scheme, the CGST Act and Rules on indiacode.nic.in remain the authoritative reference. Always cross-check the current quarter's calendar before filing, as notified due dates can shift.