GST reconciliation for manufacturing & auto components.

An auto-component plant buys thousands of raw-material lines a month, capitalises tooling and machinery, sends castings and forgings out for job work, moves stock between two or three GSTINs, and pays for HO services — audit, ERP, insurance — that benefit every unit. Each of those is a distinct GST treatment with its own reversal or return clock. At volume, a spreadsheet cannot hold the thread.

1. Inputs vs capital goods — and the common-credit reversal

Credit on raw materials (inputs) and on plant, machinery and tooling (capital goods) is both available, but they behave differently once part of your output is exempt or non-business. Under Rule 42, common credit on inputs and input services attributable to exempt supplies or non-business use must be apportioned and the ineligible portion reversed monthly and trued-up annually. Rule 43 does the same for capital goods, spreading the credit over 60 months (five years) and reversing the exempt-linked share each period.

There is a further sting on capital goods, under two distinct rules. If you cancel registration or shift to composition, Rule 44(1)(b) requires you to reverse the ITC attributable to the remaining useful life of each capital asset, computed pro-rata on a 60-month (five-year) life (declared in FORM GST ITC-03 on shifting to composition, or in the final return FORM GSTR-10 on cancellation of registration). Separately, if you sell a capital good on which ITC was taken, Section 18(6) read with Rule 40(2) requires you to pay the higher of the ITC reduced by 5 percentage points for every quarter (or part) of use, or the tax on the transaction value. Getting the 60-month schedule right per asset, per GSTIN, is exactly the kind of arithmetic that silently drifts in Excel.

2. Job work and ITC-04 — the return clock

Sending inputs or capital goods to a job worker is central to component manufacturing, and Section 143 lets you do it without paying tax — provided the goods come back in time. Inputs must return within one year and capital goods within three years (moulds, dies, jigs and fixtures are outside this limit). If they do not, the dispatch is deemed to be a supply on the day the goods were originally sent out, with tax and interest.

These movements are declared in FORM ITC-04. Filing frequency depends on turnover: taxpayers with aggregate turnover above ₹5 crore file half-yearly, others file annually. The reconciliation challenge is that challans out, challans back, and the one/three-year clocks all have to be netted per input — and the numbers rarely match the job worker's records first time. Recoup keeps the challan-out / challan-in register live so an ageing input is flagged before it crosses the deemed-supply line.

3. Cross-GSTIN stock transfers — Schedule I and Rule 28

Move stock from your Pune plant to your Chennai plant on a different GSTIN and, even without consideration, it is a supply under Schedule I (supplies between distinct persons in the course of business). It must be invoiced and taxed. Valuation follows Rule 28: the open market value, or — helpfully — where the recipient GSTIN is eligible to claim full ITC, the value declared in the invoice is deemed to be the open market value.

That "full ITC" condition is the catch. If the receiving unit has any exempt output, the deeming breaks and you are back to open market value, with the transfer feeding straight into that unit's Rule 42/43 apportionment. Reconciling inter-unit transfers means matching the sending GSTIN's outward supply to the receiving GSTIN's 2B — an internal match your external 2B tool never sees. Recoup reconciles across your GSTINs, so a branch-to-branch mismatch surfaces the same day.

4. High-volume raw-material vendors — 2B mismatch at scale

A plant buying from hundreds of steel, casting, fastener and consumable vendors generates thousands of purchase lines a month. At that volume, the usual 2B problems — a vendor filing in the wrong period, a typo'd invoice number, a partial GSTR-1, a supplier who filed GSTR-1 but not GSTR-3B — stop being occasional and become a permanent backlog. Manual VLOOKUP reconciliation collapses past a few hundred vendors, and sampling means real credit slips through unexamined.

Recoup matches 100% of invoices across bank, books and GSTR-2B — nothing sampled — and ranks the residual exceptions by rupee value with the vendor named. Instead of a bucket that says "₹14 lakh unmatched", you get "Shubham Industrial, invoice 6548, ₹20,709, amount mismatch" and "Gajjar Forgings, GF/2611, ₹48,200, vendor didn't file GSTR-3B" — chase-ready.

5. ISD is mandatory from 1 April 2025

If your head office receives common input services — group audit, software licences, insurance, marketing — that benefit multiple GSTINs, the credit must now be distributed through the Input Service Distributor mechanism. Following the Finance Act 2024 amendment to Section 20 and Rule 39, ISD registration and distribution is mandatory from 1 April 2025; the earlier practice of taking such credit directly at HO, or cross-charging it, is no longer compliant for these common third-party services.

This adds a distribution reconciliation: the HO's inward common-service invoices, the ISD invoices issued to each unit, and each unit's ITC have to tie out. Recoup tracks the HO inward pool against the distributed credit so a unit is neither short-changed nor over-credited.

What Recoup does for a manufacturing finance team

• Tri-source match — bank, Zoho Books / Tally and the GST portal (GSTR-2B / IMS) reconciled invoice by invoice, across every GSTIN, so a raw-material purchase, its payment and its 2B line are seen as one.
• Names the vendor — each mismatch or missing filing is tied to the exact supplier and invoice, ranked by rupee value, so the biggest exposure is chased first.
• Job-work register — challans out and challans in tracked against the one-year and three-year clocks, flagging inputs before they cross into deemed supply.
• Inter-unit reconciliation — branch-to-branch stock transfers matched across your own GSTINs, catching Schedule I / Rule 28 mismatches the same day.
• ISD distribution check — the HO common-service pool reconciled against credit distributed to each unit.