A delayed payment does not supply its own statutory rate
Section 61 of the Sale of Goods Act, 1930 preserves rights to recover interest or special damages where recoverable by law, and money paid where consideration has failed. Its subsection (2), absent a contract to the contrary, permits the court to award interest at a rate it thinks fit on the price in the specified seller-price or buyer-refund suits. It does not prescribe an automatic 18% rate, universal compounding or a guaranteed award merely because an invoice is overdue.
Read the applicable text: India Code: Sale of Goods Act, 1930, section 61.
Separate contractual rights from the statutory discretion
Read the signed terms, incorporated conditions and later settlement before selecting a rate or a start date. A rate printed on an invoice does not, without further analysis, prove an agreed contractual term. If a contract addresses interest, evaluate its enforceability and application rather than asserting that section 61 overrides it. Other applicable laws and procedural provisions may also matter; record which basis supports each part of the claim.
Choose the correct party and date limb
For a seller suing for the price, subsection (2)(a) refers to the date of tender of goods or the date when the price was payable. For a buyer suing for refund of the price following the seller’s breach, subsection (2)(b) refers to the date of payment. Preserve tender, due-date, payment and breach evidence separately. These alternatives are not permission to choose whichever date produces the largest spreadsheet total without explaining the legal basis.
Build a dated principal ledger
List each price component, payment, credit, refund and effective date. Calculate periods against the outstanding principal supported by the chosen basis. Explain whether the model uses simple interest, a particular day-count convention and an excluded or included first day. The worked examples below use assumed simple rates and stated elapsed-day counts divided by 365 solely for transparent arithmetic; they do not state the rate or convention a court must adopt. A live claim must derive its day count from documented start and end dates. The fixed 365 denominator is an illustration convention, including if a modelled interval happens to cross a leap year; it is not a statutory day-count rule.
Keep special damages and interest from duplicating one loss
Section 61(1) preserves claims where recoverable by law; it does not establish every consequential expense as recoverable. Identify causation, legal basis and supporting documents for each damage head. If borrowing costs or another financing loss are pleaded alongside interest, explain any overlap rather than adding the same amount twice. A claim schedule should distinguish amounts requested, admitted, settled and judicially awarded.
Close the commercial and accounting records separately
A demand letter is not a decree, and a spreadsheet is not an automatic receivable-recognition conclusion. Maintain the contractual price ledger, disputed interest claim and any award or settlement distinctly. When money is received, examine its valid appropriation before reducing principal and interest. This article focuses on the section 61 interest working; it does not determine limitation, jurisdiction, the underlying right to the price or the applicable accounting standard.
Six worked illustrations
All facts and amounts are fictional. Calculations illustrate the stated assumptions, not a predetermined legal outcome.
Illustrative example 1: A transparent illustrative rate
Assume ₹5,00,000 principal, an independently justified modelling rate of 10% simple annually and 73 days. Interest is ₹5,00,000 × 10% × 73/365 = ₹10,000. The calculation demonstrates the assumptions; section 61 itself does not fix that 10% rate.
Illustrative example 2: Why the start-date evidence matters
At the same principal and assumed rate, 30 days produce ₹4,109.59 and 60 days ₹8,219.18, rounded to paise. The ₹4,109.59 difference shows why tender and contractual due-date records matter. It does not justify retrospectively selecting the earlier date without a supported legal case.
Illustrative example 3: Principal falls during the period
Assume ₹4,00,000 remains outstanding for 30 days, followed by a valid principal reduction of ₹1,00,000 and another 30 days at 12% simple. Interest is ₹3,945.21 plus ₹2,958.90 = ₹6,904.11, rounding each period to paise. Applying ₹4,00,000 throughout would overstate this assumed model.
Illustrative example 4: Buyer refund model
A buyer paid ₹2,00,000 and, on the assumed facts, has a supported refund claim following the seller’s breach. At a purely illustrative 9% simple rate for 100 days from payment, interest is ₹4,931.51. The refund entitlement, operative date and eventual award must be established independently.
Illustrative example 5: Two invoices with different periods
Assume ₹1,00,000 for 90 days and ₹1,50,000 for 30 days at 10% simple. Rounded line interest is ₹2,465.75 and ₹1,232.88, totalling ₹3,698.63. Applying 90 days to the entire ₹2,50,000 would produce ₹6,164.38 and misstate the dated population.
Illustrative example 6: Remove an overlapping claim head
A working includes ₹12,000 modelled interest and ₹8,000 financing damage, of which ₹5,000 is identified as the same financing loss already represented in the interest claim. Before other legal issues, the non-duplicated arithmetic is ₹12,000 + ₹8,000 − ₹5,000 = ₹15,000. This does not establish that either head is legally recoverable.
Ten-step verification table
| Step | Action | Evidence |
|---|---|---|
| 1 | Identify the claim | Seller’s price suit or buyer’s refund claim and underlying facts. |
| 2 | Read the contract | Interest terms, due dates and contrary contractual intention. |
| 3 | State the legal basis | Section 61 and any separately relied-on applicable law. |
| 4 | Verify tender evidence | Delivery readiness, tender and communication records. |
| 5 | Verify payment and due dates | Bank records and enforceable contractual terms. |
| 6 | Build the principal ledger | Invoice-wise balances, credits and valid appropriations. |
| 7 | Declare calculation assumptions | Rate, simple or compound basis, days and rounding. |
| 8 | Separate damage heads | Evidence, causation and overlap analysis. |
| 9 | Distinguish claim from award | Requested, disputed, agreed and awarded amounts. |
| 10 | Reconcile the closing position | Receipts, settlement or decree and remaining amounts. |
Sixteen practitioner FAQs
1. Does section 61 prescribe 18% interest?
No. Subsection (2) refers to a rate the court thinks fit in its stated circumstances.
2. Is interest automatically awarded on every late invoice?
No. Establish the applicable legal and contractual basis and the actual claim.
3. Does a contrary contract matter?
Yes. Subsection (2) expressly operates in the absence of a contract to the contrary.
4. Does an invoice rate always prove agreement?
No. Examine incorporation, assent and enforceability on the facts.
5. Which seller dates are mentioned?
Tender of the goods or when the price was payable, under subsection (2)(a).
6. Which buyer date is mentioned?
The payment date in the specified buyer refund suit under subsection (2)(b).
7. Can a buyer’s refund entitlement be assumed from the payment alone?
No. Establish the breach and refund basis separately.
8. Does the Act mandate compounding in this provision?
Section 61 does not itself prescribe an automatic compounding formula.
9. Are the example rates statutory rates?
No. They are explicitly assumed inputs for calculation checks.
10. Must every invoice use the oldest due date?
No. Keep the dated principal population accurate.
11. Should repayments affect the calculation?
Assess their valid appropriation and resulting outstanding balance rather than ignoring them.
12. Does section 61 guarantee every special-damage claim?
No. It preserves recoverability where supported by law; evidence and legal tests still matter.
13. Can interest and financing damages always be added?
No. Analyse duplication and the legal basis of each head.
14. Is the spreadsheet amount the awarded amount?
Not necessarily. Distinguish a model, a pleaded claim and an actual award or settlement.
15. Does this article fix limitation or forum?
No. Those questions require a separate case-specific assessment.
16. What makes the working reviewable?
A source for each principal amount, date, rate assumption, credit and damage head, with a reproducible calculation.