Gold Wastage and Melting Loss Inventory Reconciliation for Jewellers

A national jewellery retailer’s inventory controller opens the quarterly reconciliation pack for the three months ending 30 June 2026. The consolidated job-work register shows 4,180 kilograms of 24-carat equivalent gold dispatched to 312 karigar workshops across South India, ₹2,830 crore of input value at the average daily rate for the quarter. The finished output received back reads 3,876 kilograms across 41,200 individual pieces, plus declared wastage of 251 kilograms, plus karigar retention of 38 kilograms — total accounted 4,165 kilograms. The unexplained gap is 15 kilograms — 0.36% of the input — and at the quarter-end gold rate that is ₹10.4 crore of gold value that neither entered the finished-piece register nor the wastage-and-retention register. Section 17(5)(g) or 17(5)(h) exposure on the gap, at the CGST plus SGST rate of 3% on gold input under HSN 7108, is ₹31 lakh of blocked ITC for the quarter, before interest under Section 50 and any Section 74 penalty. This is gold wastage melting loss inventory reconciliation jewellery at production scale, and the reconciliation discipline that resolves it decides whether the retailer defends the position under audit or writes it off.

Quick reference

The reconciliation in one paragraph

A jeweller sending gold to a karigar for finished-piece manufacture starts with an input weight measured in 24-carat equivalent grams (any purity below 24-carat is grossed up to 24-carat for the register — 22-carat scrap of 1,000 grams becomes 916.6 grams of 24-carat equivalent). The gold is dispatched under a Section 143 job-work challan and must be brought back as finished pieces within one year, or the movement is deemed a supply on the dispatch date and the retailer pays tax on the value sent out. The karigar refines the input at the melting stage, losing 0.3-0.7% to melt slag and oxidation depending on furnace efficiency and input purity, and this loss is captured on the refining assay certificate. The refined 24-carat gold is then formed into finished pieces, and the making process loses a further 1-8% to wastage depending on design intricacy — filings, dust, and irrecoverable fines. Where the labour arrangement includes gold retention as part of karigar compensation, a further weight is retained and valued at the day’s gold rate. The reconciliation ties four numbers per challan — input, refined, output, retention — and flags any unexplained gap between the input weight and the sum of (output + wastage + retention + melting loss) for finance-team sign-off before the quarterly ITC-04 is filed. The BIS HUID data on each finished piece is the third-party validation that anchors the output register.

What the karigar workflow looks like in India — operational walkthrough

Walk through the manufacturing floor at a national jewellery chain — modelled loosely on the Chennai or Coimbatore hub-and-spoke operations used by Tanishq, Kalyan Jewellers, and Malabar Gold & Diamonds. The retailer maintains a central refining facility and a network of 40-80 karigar workshops within a 200-kilometre radius. The retail store sends daily bill-of-material requests to the central planning cell — for the next 30 days, we need 120 kilograms of 22-carat gold in bangle-and-mangalsutra format for the wedding season, 45 kilograms in temple-jewellery filigree, and 28 kilograms in kundan-set diamond pieces. The planning cell aggregates the demand, releases 22-carat scrap from the customer-exchange pool plus fresh 24-carat purchase against outstanding metal-loan lines, and dispatches to karigars under Section 143 challans.

The consignment to Karigar A — an individual proprietor running a 6-artisan filigree unit in Tenkasi — is 8.4 kilograms of 22-carat scrap gold on 2 May 2026, dispatched under challan JW/2026/00412. The scrap is converted to 24-carat equivalent at 916.6 grams per 1,000 grams — the challan therefore records input weight of 7,700 grams (24-carat equivalent). The design brief is 42 pieces of medium-intricate filigree temple-jewellery pendants and 18 pieces of heavy filigree jhumka earrings. The design master flags the whole consignment at the 6-8% wastage band because filigree is the intricacy driver. Permitted wastage at 7% is 539 grams; expected finished output is therefore 7,161 grams; karigar retention is nil (Karigar A is on a cash-only labour arrangement at ₹680 per gram of finished output).

Karigar A returns the finished pieces on 26 June 2026 — 46 days after dispatch, well within the Section 143 one-year window. The returned weight is 7,088 grams across the 60 pieces, all BIS-hallmarked with individual HUIDs. Refining assay from Karigar A’s in-house furnace shows melting loss of 0.5% (39 grams) on the initial melt from 22-carat scrap to 24-carat equivalent. Declared making wastage on the karigar-signed weight statement is 573 grams — that is 7.44% of the input (7,700 - 39 = 7,661 refined, less 7,088 output = 573 wastage). The observed wastage of 7.44% is inside the design-category tolerance band of 6-8%, so no exception is raised. The reconciliation for this challan closes at input 7,700 grams = output 7,088 + wastage 573 + melting loss 39 = 7,700 grams, zero unexplained gap.

The consignment to Karigar B — a partnership firm running an 18-artisan casting unit in Coimbatore — is 24.6 kilograms of 24-carat freshly purchased gold on 4 May 2026, dispatched under challan JW/2026/00437. The design brief is 320 solid gold bangle sets and 180 mangalsutra chains in standard cast format. The design master flags the whole consignment at the 2-4% wastage band. Permitted wastage at 3% is 738 grams; expected finished output is 23,862 grams; karigar retention is 0.5% (123 grams) under Karigar B’s cash-plus-retention labour arrangement.

Karigar B returns on 12 June 2026. The returned weight is 23,591 grams across the 500 finished pieces. Melting loss on the assay is 74 grams (0.3%, which is at the good-furnace end because this is fresh 24-carat purchase not requiring re-purification). Declared wastage is 812 grams — that is 3.31% of the input, marginally above the 2-4% tolerance band midpoint but inside the ceiling. Karigar retention taken at 4 May 2026 opening gold rate is 123 grams, valued at ₹88.6 lakh at that day’s rate. Reconciliation: input 24,600 = output 23,591 + wastage 812 + retention 123 + melting loss 74 = 24,600 grams, zero unexplained gap. The retention of 123 grams grosses up into the Karigar B TDS deduction base for FY26-27 alongside the cash labour of ₹1.60 crore for the same challan.

The consignment to Karigar C — an individual proprietor running a 4-artisan hand-crafted unit in Salem — is 3.1 kilograms of 22-carat scrap gold on 8 May 2026, dispatched under challan JW/2026/00461. The design brief is 28 pieces of medium-weight temple mala and 12 pieces of dabbi bangles in hand-crafted format. The design master flags at the 4-6% band. Karigar C returns on 3 July 2026 with 2,616 grams of finished output. Assay shows melting loss of 21 grams (0.7%, on the poor end because Karigar C uses an older gas furnace). Declared wastage is 205 grams — 7.22% of the 22-carat scrap, or 7.22% of the 24-carat equivalent input of 2,841 grams (3,100 × 0.9166 = 2,841). This is outside the design-category tolerance band of 4-6%. The challan is flagged as an exception. Finance requests karigar-signed weight verification, BIS HUID cross-check on the 40 pieces, and design-review sign-off. On investigation, 3 of the 12 dabbi bangles were re-worked twice because the customer wedding order was changed mid-manufacture and the design intricacy migrated from the 4-6% band to the 6-8% band. Design master is updated retrospectively, the challan is re-classified at 6-8%, and the observed 7.22% now falls inside the revised band. Exception is closed with sign-off from the design head and the finance controller.

The regulatory overlay — Section 143 read with Section 17(5) and ITC-04

Section 143 of the CGST Act 2017 governs the principal-to-job-worker gold movement. The principal — the retailer or manufacturer — must maintain a challan under Rule 45 for every dispatch, and the goods sent must return within one year for inputs (three years for capital goods) or the movement is deemed a supply on the date of dispatch, requiring the principal to pay tax on the value of goods sent out. The one-year window is the primary anti-abuse control; every job-work challan is time-stamped and the ITC-04 return captures dispatches, returns, and pending balances at quarter-end.

Section 17(5) of the CGST Act enumerates the blocked credits — categories of inputs on which ITC is not available even if the input is otherwise a business expense. Two sub-clauses are directly relevant to the wastage reconciliation. Section 17(5)(g) blocks ITC on goods used for personal consumption. Section 17(5)(h) blocks ITC on goods lost, stolen, destroyed, written off, or disposed of by way of gift or free samples. Where the retailer’s declared wastage exceeds the industry norm — measured against the retailer’s own design-category tolerance bands, industry association benchmarks, or the retailer’s historical average — the department can allege that the excess is in substance personal consumption (a diversion of gold to individuals) or a disposal by way of loss for which the retailer is not entitled to ITC. The department reverses the ITC in the proportion of excess wastage to total input, levies interest at 24% per annum under Section 50 from the date the credit was availed, and — if fraud or willful misstatement is alleged — imposes a Section 74 penalty of 100% of the tax.

The evidentiary threshold for the retailer’s defence is the third overlay — the record-keeping discipline read from Rule 42 (common-use ITC allocation) and Rule 45 (job-work challans and ITC-04 return). The retailer must maintain, per Rule 45(3), a Form ITC-04 quarterly return that captures every consignment sent to a job-worker with challan number, HSN, quantity, and value in Table 4; every receipt back with reference to the outward challan, quantity received, and loss-or-waste column in Table 5; and the closing balance of goods still at the job-worker in Table 6. The Table 5 loss-or-waste column is the departmental view of wastage, aggregated across the quarter. A retailer running a consistent 6-8% aggregate loss-or-waste column across multiple quarters typically draws a departmental audit under Section 65 within 12-18 months. The audit-defence position rests on presenting the loss-or-waste column with a design-category segmentation showing that the aggregate mix genuinely trends toward the intricate end, backed by BIS HUID data tying each output piece to a manufacturing lot and a challan.

The income-tax overlay runs in parallel. The karigar’s cash labour is subject to TDS under Section 393(1) Sl. 4 of the Income-tax Act 2025 — payment code 1001 for individual / HUF karigars at 1%, code 1023 for other job-workers at 2%, both being the successor to legacy Section 194C. Where the labour arrangement includes karigar retention of gold as part of compensation, the retention is a payment in kind and must be valued at the day’s gold rate and grossed up into the TDS deduction base. Retailers who deduct only on the cash-labour portion under-deduct at source and expose themselves to Section 271C penalty plus interest under Section 201(1A). The karigar workshop labour TDS article walks through the deduction-base mechanics in full.

The job-work versus principal-to-principal purchase classification matters here as well — a karigar who is billing pure labour is on Section 393(1) Sl. 4, but a karigar who is billing finished jewellery on a principal-to-principal basis (using the karigar’s own gold or gold purchased from third parties) is on Section 393(1) Sl. 8 (legacy Section 194Q) at 0.1%, and there is no job-work challan or ITC-04 reporting because the goods are not being sent for job-work. Mis-classifying a principal-to-principal supply as job-work generates spurious ITC-04 entries and mis-classifying job-work as principal-to-principal loses the Section 143 challan protection.

A worked example — a national jewellery chain filigree job-work reconciliation

A national jewellery chain (illustrative — modelled loosely on the karigar-cluster operations used by Malabar Gold & Diamonds, Kalyan Jewellers, and Tanishq) sends 1 kilogram of 24-carat gold to a hand-crafted filigree karigar on 12 May 2026 under challan JW/2026/00734. The design brief is 84 medium-intricate filigree pendants and 22 heavy filigree jhumka earring pairs. The design master flags the consignment at the 6-8% wastage band.

Illustrative — the karigar-cluster operating pattern is publicly known but individual-challan detail is not published; the figures below are representative of the operating pattern, not actual retailer data. Cross-verify against your own job-work register and BIS HUID master before action.

The expected reconciliation reads:

The actual return on 24 June 2026 reads:

The 12-gram unexplained gap is 1.2% of the input, materially outside the design-category tolerance band and well above the noise-level threshold (typically 0.3-0.5% for a well-run manufacturing floor). The challan is flagged as an exception and routed to finance for investigation.

The exposure calculation runs as follows. Gold input value at the 12 May 2026 opening rate of ₹7,340 per gram of 24-carat equivalent is ₹73.4 lakh for the 1-kilogram dispatch. The 12-gram gap at the same rate is ₹88,080. The blocked-credit exposure under Section 17(5) is 3% of ₹88,080 = ₹2,642 of CGST plus SGST reversal, plus interest at 24% per annum under Section 50, plus potential Section 74 penalty of 100% of tax if the department alleges willful misstatement. On a network running 100 kilograms of gold per year to karigars with a systematic 1.2% unexplained-gap pattern, the aggregate exposure is 1,200 grams of gold at ₹73.4 lakh per kilogram = ₹8.8 lakh of gold value, ₹26,400 of blocked ITC per annum, and cumulative multi-year exposure across the five-year Section 74 window.

The investigation on the specific 12-gram gap surfaces two possibilities. First, the karigar under-declared wastage by 12 grams — the true wastage is 72 grams (7.2%), still inside the 6-8% band, and the karigar has kept the 12 grams as unreported personal retention. This is a Section 393(1) Sl. 4 TDS under-deduction issue — the 12 grams valued at ₹88,080 must be grossed up into the karigar TDS base, adding 1% (code 1001) or 2% (code 1023) to the FY26-27 deduction. The GST exposure disappears because the true wastage is inside the tolerance band and the ITC is defensible. Second, the karigar’s weighing scale is out of calibration and the true output is 940 grams, not 928 grams — the 12-gram gap is a measurement error. The retailer requires a BIS-certified re-weigh at the retail store’s own scale before accepting the returned pieces into the finished-goods register. If the re-weigh confirms 940 grams, the reconciliation closes at input 1,000 = output 940 + wastage 60 = 1,000, zero unexplained gap. If the re-weigh confirms 928 grams, the retailer has a Section 17(5) exposure of ₹2,642 CGST plus SGST on the 12-gram gap and must reverse the ITC in the current quarter’s GSTR-3B.

The BIS HUID data adds a third check. The 106 finished pieces carry 106 individual HUIDs, and the aggregate weight declared on the BIS hallmarking centre’s certificate must equal the returned weight. If BIS certificate says 940 grams and the karigar’s weight statement says 928 grams, the retailer trusts BIS (third-party validated) and the reconciliation closes at 940. If BIS says 928 grams and karigar says 928 grams, the retailer trusts the concordant weight and the Section 17(5) exposure stands.

The hallmarking BIS charges cost accounting article covers the HUID-generation flow and the ₹45 per HUID BIS charge that anchors the third-party validation. The mixed-rate jewellery invoice reconciliation article covers the downstream retail-invoice discipline once the finished pieces enter the customer-facing register.

Common reconciliation breakages

• Blended wastage across all designs. Retailers who apply a flat 5% wastage tolerance across machine-made chains, standard cast bangles, and intricate filigree lose the audit-defence position when the department alleges that a portion of the aggregate wastage is Section 17(5) blocked credit. The design-category segmentation must exist in the retailer’s own register even if ITC-04 is filed at aggregate — the segmentation is the defence artefact.

• Melting loss and making wastage lumped together. A single “wastage 8%” number on the karigar statement cannot be defended if the department asks for the metallurgical basis. Melting loss is 0.3-0.7% and is on the refining assay; making wastage is design-dependent and is on the karigar-signed weight statement. Retailers who capture only the aggregate lose the ability to attribute variance to one leg or the other.

• Karigar retention treated as pure wastage. Where the labour arrangement includes gold retention as part of karigar compensation, the retained gold is not wastage — it is a payment in kind and must be valued at the daily rate and grossed up into the Section 393(1) Sl. 4 TDS base. Retailers who record the retention as wastage under-deduct TDS and simultaneously over-state the wastage number in ITC-04, doubling the exposure.

• BIS HUID data not tied to the job-work challan. Every finished piece carries an HUID from 1 April 2023, and every HUID ties to a manufacturing lot. Retailers who do not maintain the HUID-to-challan crosswalk lose the third-party validation of output weight against input dispatch — the karigar’s weight statement is the only evidence, and the department discounts karigar evidence as self-serving.

• ITC-04 filed with blended loss-or-waste column. Table 5 of ITC-04 has a single loss-or-waste column per outward challan reference. Retailers who file with no supporting design-category register lose the ability to explain a 6-8% aggregate to the department. The supporting register is not required by the ITC-04 form but is required by the audit-defence discipline.

How a reconciliation platform handles this

Terra Insight’s reconciliation platform (TransactIG) treats every job-work challan as a multi-leg reconciliation event and stages the input weight, refined weight, output weight, wastage, retention, and melting loss as separate signals against the design-category tolerance band, the BIS HUID master, and the karigar TDS working. The multi-pass matching engine cross-references the challan-level extract against the ITC-04 support register, the finished-goods HUID crosswalk, and the karigar payment ledger — surfacing exception challans for finance-team sign-off before the quarterly ITC-04 is filed. Retailers running the platform typically move from 51% first-pass match to 88% first-pass match on the input-output weight reconciliation, with the residual routed to audit workflow rather than to a Section 17(5) exposure at year-end. The commercial pillar for the category is jewellery reconciliation software India, and the broader reconciliation software India hub anchors the cross-category architecture.

For jewellers integrating the wastage reconciliation with the customer-facing invoice discipline, the mixed-rate jewellery invoice reconciliation article covers the downstream retail-billing flow; the gold at 3% vs making charges at 5% article frames the output-rate classification; and the metal loan gold-price fixation article walks the price-fixation flow that decides how the input gold entered the register in the first place. For retailers dealing with old-gold exchange feeding the scrap pool, the old-gold exchange reconciliation article covers the pre-refining flow.

The five FAQs below address the operational questions Indian jewellers ask most often when implementing structured wastage-and-melting-loss inventory reconciliation.

Terra Insight Editorial Team Reconciliation Infrastructure

Content authored by practitioners with experience at Amazon India, Intuit QuickBooks, and the Tata Group. Meet the team →

Published 1 July 2026

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TDS Reconciliation GST Input Credit Platform Settlements NACH Batch Matching Bank Reconciliation Form 26AS Matching ERP Integrations Enterprise Finance Ops

Reviewed by

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Navin Krishnan

Managing Director & Founder — Terra Insight

Ex Amazon India · Intuit QuickBooks · Tata nexarc

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