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An Indian Tier-1 auto-component supplier handling 200 to 500 OEM tooling transactions a year — stamping dies, injection-mould tools, gauges, fixtures, check-pins — across Maruti, Hyundai, Tata Motors, Mahindra, M&M and others must classify each tooling payment correctly between capital reimbursement (no TDS) and revenue conversion charge (TDS under Section 393(1)(a) code 1002 at 1% or 2%). Three live patterns operate — OEM-capitalised lump-sum reimbursement, supplier-capitalised piece-rate recovery, and OEM-capitalised amortised piece-rate — each with different income-tax, GST and balance-sheet treatments. Misclassification carries Section 201(1A) interest, Section 40(a)(ia) disallowance and OEM-supplier reconciliation disputes that surface only at year-end.
Anchor every tooling transaction in a contract-class register tagged by pattern (lump-sum / piece-rate / amortised) with title-transfer clause, capitalisation-side (OEM / supplier), depreciation-side, GST classification (HSN goods / SAC services), and TDS treatment (capital exempt / revenue at code 1002 / mixed). For each pattern, drive the three legs — income-tax (deduct or not), GST (rate and HSN / SAC), balance-sheet (whose books) — consistently. Reconcile against the OEM's Form 168 entries to confirm no TDS was deducted on lump-sum reimbursements and TDS was deducted at code 1002 on piece-rate components. Maintain a contract-class master with title, capitalisation, depreciation and TDS treatment per tool to defend audit queries.
Tool register per OEM with contract pattern (lump-sum / piece-rate / amortised), title-transfer clause reference, OEM / supplier capitalisation flag, depreciation calendar, HSN / SAC code per leg, TDS treatment per leg (no TDS / code 1002 / mixed), purchase-order cross-reference, GL mapping (capital reimbursement account, conversion-charge revenue account, tool amortisation account), Form 168 cross-tie register per OEM TAN, and contract-class library with audit-defensible precedents.
A tool-by-tool dashboard showing pattern classification, title transfer status, capitalisation side, depreciation accumulated to date, TDS treatment applied, OEM Form 168 deductions reconciled, the substance memo on file for each pattern, and an audit-defensible classification trail for each tooling transaction in the FY.
A Chennai-based Tier-1 sheet-metal supplier to Maruti Suzuki, Tata Motors and Hyundai Motor India runs an annual tooling spend of approximately ₹14 crore across 18 active stamping dies, 24 fixtures and gauges, and 6 injection-mould tools. The contract patterns split roughly evenly across the three live patterns — six tools on OEM-capitalised lump-sum reimbursement, ten tools on supplier-capitalised piece-rate recovery, and two tools on OEM-capitalised amortised piece-rate. On 18 May 2026 the controller is reviewing a ₹1.8 crore lump-sum tooling invoice raised to Maruti for a new front-floor stamping die supplying the Manesar plant. Maruti’s accounts-payable system has flagged the invoice for 2% TDS at payment code 1002 under Section 393(1)(a) of the Income Tax Act 2025. The supplier’s tax team believes no TDS should bite — the title transferred on payment, Maruti will capitalise the die, the supplier will not depreciate it. This is TDS tooling payment capital revenue auto component classification at the live edge — a ₹3.6 lakh TDS over-deduction at stake, and a precedent for every future die under the same contract pattern.
This article walks the three live patterns, the substance test, the contract clauses that drive the answer, the GST overlay, the legacy 194C precedent that transfers cleanly into the Section 393(1)(a) framework, and a worked example on the ₹1.8 crore die.
Quick reference
| Pattern | TDS treatment | GST treatment | Balance-sheet side | Payment code |
|---|---|---|---|---|
| OEM-capitalised lump-sum reimbursement | No TDS (capital reimbursement outside Section 393(1)(a)) | 18% GST on goods supply (HSN 8207 / 8466) | OEM capitalises and depreciates | n/a |
| Supplier-capitalised piece-rate recovery | TDS at code 1002 on full piece price (1% / 2%) | 18% GST on services supply (SAC 9988) | Supplier capitalises and depreciates | 1002 |
| OEM-capitalised amortised piece-rate | TDS at code 1002 on conversion-charge component only | 18% GST on services component (SAC 9988) | OEM capitalises; supplier records amortisation as offset | 1002 (partial) |
| Cross-era (Q4 FY 2025-26) | Same substance test, under legacy 194C | Same as new framework | Same | Legacy 194C |
Why does this classification matter for an auto-component supplier?
A typical Tier-1 sheet-metal or precision-machining supplier handles 200 to 500 tooling transactions a year. At a ₹1.8 crore die on the lump-sum pattern, a wrong TDS deduction at 2% is ₹3.6 lakh trapped in the OEM’s challan for the year, refundable only through Form 168 reconciliation and the supplier’s ITR refund cycle — a 14 to 22-month tie-up. A wrong no-deduction on a piece-rate pattern is the opposite — the supplier carries Section 201(1A) interest at 1% per month on the under-deducted amount and a Section 40(a)(ia) disallowance of 30% of the conversion-charge expenditure into the assessment year. Multiply across the 200-to-500 transactions and the misclassification exposure runs into crores.
The substance-over-form principle that drives the analysis is preserved cleanly from legacy Section 194C of the Income Tax Act 1961 into Section 393(1)(a) of the Income Tax Act 2025. The wider statutory shift is set out in Section 393(1)(a) TDS on auto-component job work, and the supplier’s reconciliation discipline against OEM Form 168 entries in Form 26AS / Form 168 reconciliation for auto-component suppliers.
Pattern 1 — OEM-capitalised lump-sum reimbursement
Under this pattern, the OEM places a one-time purchase order for the tool, the supplier manufactures it (in-house tool room or commissioned to a tool-maker), title transfers to the OEM on payment, and the supplier raises a lump-sum tax invoice — a ₹1.8 crore stamping die billed once, against a clear PO for the die itself.
Income-tax treatment. The lump-sum is a capital reimbursement to the OEM. The supplier neither capitalises the tool nor depreciates it; the tool sits on the OEM’s balance sheet from the date of payment. Under the substance test, the payment is not for “work” done by the supplier in the conversion sense — it is the consideration for transfer of a tangible asset. TDS under Section 393(1)(a) code 1002 does not apply.
GST treatment. The supply is a supply of goods under the CGST Act at HSN 8207 (tools for stamping) or 8466 (parts and accessories of machine tools), at the prevailing GST rate (18%). The supplier raises a standard tax invoice with HSN, place-of-supply and the GST split.
Balance-sheet side. OEM capitalises at ₹1.8 crore, depreciates over the die’s useful life (typically 5 to 7 years on accelerated WDV). The supplier records the receipt as revenue from sale of tool, with cost-of-tool as direct expense.
Risk. OEM accounts-payable systems often default to deducting TDS at code 1002 on every supplier invoice — the supplier has to flag the lump-sum tooling invoice as “capital reimbursement, no TDS” at the time of submission and route a covering memo with the contract reference to the OEM’s tax team.
Pattern 2 — Supplier-capitalised piece-rate recovery
Under this pattern, the supplier funds the tool itself, capitalises it on its own balance sheet, depreciates it over its useful life, and recovers the investment through a per-piece amortisation built into the piece price of every component produced from that tool. There is no separate tooling invoice — the tooling cost is recovered transparently through the conversion-charge per-piece price.
Income-tax treatment. Every component invoice the supplier raises to the OEM is a contract conversion charge in full — TDS at code 1002 (1% / 2%) applies on the gross piece price, including the per-piece tooling amortisation component. There is no carve-out for the tooling-recovery slice.
GST treatment. The supply is a supply of services (manufacturing services on physical inputs owned by others — SAC 9988) where job-work pattern applies, or a supply of goods where the supplier ships finished components against its own raw-material procurement. The GST rate (18% for job-work, applicable HSN for goods supply) covers the gross piece price.
Balance-sheet side. Supplier capitalises the tool, depreciates it over its useful life, and books the per-piece amortisation as cost-of-sale. The OEM treats the entire piece price as variable component cost.
Risk. None on TDS treatment — straightforward Section 393(1)(a) application. The risk is on the supplier’s depreciation life and tool-utilisation assumption; if the OEM cancels the programme early, the supplier may not fully recover the tool cost.
Pattern 3 — OEM-capitalised amortised piece-rate
Under this pattern, the OEM funds the tool through a lump-sum payment (similar to Pattern 1 on the funding leg), takes title, capitalises and depreciates it on its own books — but instead of leaving the conversion-charge piece price clean, the contract unbundles the piece price into a pure conversion-charge component plus a per-piece tool-amortisation component representing the OEM’s amortisation recovery (which is usually nominal or zero because the OEM has separately capitalised the tool).
Income-tax treatment. TDS at code 1002 applies on the pure conversion-charge component of the piece price. The per-piece tool-amortisation component is a balance-sheet netting that reverses the OEM’s depreciation entry — it is not revenue in the supplier’s hands. Most contracts under this pattern explicitly carve the amortisation leg out of TDS. The conservative OEM-side practice is to deduct TDS on the gross piece price (including the amortisation leg) and let the supplier dispute the over-deduction later — which generates persistent reconciliation friction.
GST treatment. The conversion-charge component is supply of services at SAC 9988. The amortisation component is typically not separately invoiced and not separately GST-treated (treated as a netting adjustment); some contracts do separately invoice and GST-treat the amortisation leg, in which case the supplier raises two GST lines per shipment.
Balance-sheet side. OEM capitalises and depreciates. Supplier neither capitalises nor depreciates — the amortisation leg is a contractual recovery / offset, not the supplier’s own asset.
Risk. Highest of the three patterns. Contract ambiguity on the amortisation-versus-revenue characterisation leaves the supplier exposed to OEM gross-deduction practice. The TDS register must clearly tag the conversion-charge component versus the amortisation component on every shipment.
Section 393(1)(k) vs 394 threshold determiner
When a tooling transaction sits at the boundary between supply of goods (code 1012 under Section 393(1)(k)) and contract conversion charge (code 1002 under Section 393(1)(a)), the threshold determiner resolves which provision bites and at what rate.
Open the threshold determiner →CBDT view and judicial precedent
CBDT has not issued a definitive circular settling the tooling classification under either legacy Section 194C or new Section 393(1)(a). Multiple tribunal and high-court decisions in cases involving major Tier-1 suppliers to Maruti, Hyundai, Tata Motors and Mahindra have addressed the lump-sum tooling pattern and have generally upheld the capital-reimbursement characterisation where (a) the contract clearly identifies the tooling supply as separate from the conversion-charge supply, (b) title transfers to the OEM on payment, (c) the supplier does not capitalise or depreciate the tool, and (d) the lump-sum amount is independently determined (not embedded in the piece price).
Conversely, where the tooling supply is bundled into the conversion-charge stream and the OEM-paid amount does not clearly fund a tool transfer, the courts have leaned towards full TDS treatment under contract-work provisions.
The substance-over-form analysis under Section 393(1)(a) preserves these precedents. The Income Tax Act 2025 framework does not change the underlying chargeability test — what changes is the statute, the payment code (1002 replacing legacy 194C codes) and the return (Form 168 replacing Form 26Q). The supplier’s defence remains the same: contract clarity, title-transfer evidence, capitalisation-side documentation, and operational consistency across all tools under the same pattern.
Worked example — ₹1.8 crore stamping die for Maruti Manesar
The Chennai supplier ships front-floor body-in-white panels to Maruti Suzuki Manesar from a new ₹1.8 crore stamping die. The PO and contract structure:
Lump-sum tooling PO. Maruti issues a one-time purchase order for the die at ₹1.8 crore, with title transferring to Maruti on full payment. The supplier manufactures the die in its in-house tool room over 14 weeks, books cost-of-tool ₹1.42 crore, and raises a lump-sum tax invoice ₹1.8 crore plus 18% GST. The contract clearly identifies the die as a separate supply from the conversion-charge stream.
Conversion-charge piece-rate. Maruti separately contracts piece-rate at ₹147 per panel, with annual volume guarantee of 4.8 lakh panels. The piece-rate price is a pure conversion charge — no tooling-amortisation embed, because Maruti has separately capitalised the die.
TDS treatment on the ₹1.8 crore lump-sum. No TDS under Section 393(1)(a). The supplier’s invoice cover memo states “capital reimbursement, no TDS applicable — see PO reference, title clause”. Maruti’s tax team confirms the position and the AP system bypasses the auto-deduction default.
TDS treatment on the conversion-charge stream. Each monthly conversion-charge invoice (40,000 panels × ₹147 = ₹58,80,000) is a contract conversion charge under Section 393(1)(a). Per-invoice threshold crossed; aggregate threshold crossed within Q1 itself. Maruti deducts TDS at 2% (supplier is a Pvt Ltd company) under code 1002 on every conversion-charge invoice — ₹1,17,600 per month, approximately ₹14,11,200 annually.
GST treatment. Lump-sum die invoice carries 18% GST on goods supply at HSN 8207 = ₹32,40,000. Conversion-charge invoice carries 18% GST on services supply at SAC 9988 on each monthly invoice = ₹10,58,400 per month.
Balance-sheet side. Maruti capitalises the die at ₹1.8 crore, depreciates over 7 years. Supplier books ₹1.8 crore revenue from sale of tool, ₹1.42 crore cost-of-tool, ₹38 lakh gross margin on the tool. Conversion-charge revenue runs separately on the P&L.
Cross-era cross-reference. A separate ₹95 lakh fixture invoice raised on 24 March 2026 and paid 5 April 2026 falls under Section 393(1)(a) (date of payment governs) — but the same substance test applies and the no-TDS treatment carries through. The supplier holds the legacy 194C precedent documentation and the new 393(1)(a) memo in the same contract file.
Where tooling TDS reconciliation breaks in practice
Four recurring failure modes:
- OEM AP system defaults. Most OEM AP systems default to deducting TDS at code 1002 on every supplier invoice. The supplier has to actively flag the lump-sum tooling invoice as capital reimbursement and route a covering memo — without it, the OEM deducts and the supplier carries the refund cycle
- Pattern drift mid-programme. A tool funded under Pattern 1 (lump-sum) sometimes gets re-characterised in a contract amendment to Pattern 3 (amortised) without the TDS treatment being formally re-set. The supplier carries OEM-deducted TDS on the amortisation leg of subsequent invoices that should be exempt
- Ambiguous amortisation invoices. Under Pattern 3, the per-piece amortisation leg is sometimes invoiced separately as a “tool amortisation recovery” line without clear non-revenue characterisation, triggering OEM TDS on a balance-sheet netting transaction
- Cross-era boundary slips. A 28 March 2026 tooling lump-sum paid on 5 April 2026 sometimes gets posted to legacy 194C on the OEM side because the AP master hasn’t switched defaults — even though both eras carry the same no-TDS substance outcome, the wrong code in Form 168 creates an unnecessary reconciliation entry
TDS mismatch estimator
Estimate the value at risk from tooling-classification TDS mismatches across your OEM tool register — pattern drift, ambiguous amortisation, OEM AP defaults.
Open the TDS mismatch estimator →How this rail ties into the wider auto stack
Tooling-payment classification under Section 393(1)(a) code 1002 sits at the intersection of the supplier’s OEM contract architecture, the Section 143 deemed supply GST framework for OEM-supplied tooling, and the Form 26AS / Form 168 reconciliation discipline against OEM deductions. For the consolidated code map see TDS payment codes 1001-1092, and for the broader sub-pillar automotive component manufacturing reconciliation. For statutory text and judicial precedent see the Income Tax portal.
What automated reconciliation changes
Manual tooling-classification tracking across 200 to 500 tools a year, running three live patterns, defending contract-class consistency, reconciling OEM defaults against the supplier’s substance position, and maintaining the cross-era 194C ↔ 393(1)(a) trail is where audit-year exposure compounds. Purpose-built auto component reconciliation software India holds the per-tool contract-class register, applies the substance test consistently, generates the cover memo for each lump-sum invoice, splits the conversion-charge component from the amortisation component on Pattern 3 invoices, reconciles OEM Form 168 deductions tool-by-tool, and maintains the cross-era trail. TransactIG carries 24+ industry presets including an auto-component tooling-classification configuration. Customer outcomes include match-rate improvement from 51% to 88%. Build is two-to-four weeks on AWS Mumbai (ISO 27001:2022). For the broader outbound TDS reconciliation discipline see TDS reconciliation software.