Three days is a specific past-due test, not a universal interest holiday
Under RBI’s Commercial Banks card directions, paragraph 23(5) permits the stated CIC past-due reporting or penal charges only when the account remains past due for more than three days. However, days past due and late charges are computed from the statement’s payment due date. Paragraph 23(6) separately addresses interest and loss of the interest-free period. Do not automatically add three free days to every finance-charge calculation.
Use the current issuer-specific framework
RBI’s directions updated 1 October 2026, paragraphs 22–23 require transparent interest methodology and illustrative examples. The defined commercial-bank scope excludes Small Finance Banks, Payment Banks and Local Area Banks. Establish the governing issuer, product terms, applicable APR, payment appropriation and actual credit dates. The rule does not prescribe one national monthly interest rate or fixed late fee for all cards.
Separate outstanding principal from the original bill
Late-payment and related delay charges use the outstanding amount after the due date, not the original total amount due. Payments, refunds and reversed transactions must be reflected as and when credited. Interest also follows adjusted outstanding amounts under the stated rules. A merchant’s promise of a refund or an initiated payment is not by itself the actual ledger credit; reconcile timing before alleging an overcharge.
Avoid negative amortisation and further charges on unpaid charges
Paragraph 23(2) requires terms, including the minimum amount due, to avoid negative amortisation and prohibits capitalising unpaid taxes, levies and charges by levying interest or other charges on them. This is not a statement that paying only the minimum clears principal or preserves the interest-free period. The directions require the minimum-payment warning and an explanation that the interest-free period is suspended when a previous bill balance remains outstanding.
Check rate changes and complaints with evidence
Changes in charges operate prospectively with at least one month’s prior notice under paragraph 23(7). Separate the notice date, effective date and transaction ledger. A disputed calculation should identify principal, credit dates, the actual contractual calculation method and the precise prohibited component. All rates in the numerical models below are fictional assumptions, not statements of an issuer’s current price or a statutory ceiling. No example calculates a universal compensation award.
Six worked illustrations
All facts and amounts below are fictional. Assumptions describe the model, not additional statutory rules.
Illustrative example 1: Exactly three versus more than three
Assume the account remains past due under the applicable rules after a 10 November 2026 payment due date. With the due date excluded for this day-count model, 13 November is day three and 14 November day four. The more-than-three-days test distinguishes those dates; it does not reset the computation start to 14 November.
Illustrative example 2: Adjusted late-charge base
The original bill is ₹80,000. Assume a ₹50,000 payment and ₹10,000 refund have actually been credited in the relevant sequence, with no other movements. Remaining outstanding is ₹20,000. A late-charge base still using the original ₹80,000 would exceed that reconciled amount by ₹60,000; the actual fee must follow the applicable published terms.
Illustrative example 3: Exclude unpaid charges from further interest
Assume permitted interest-bearing outstanding principal is ₹20,000 and separately identified unpaid taxes/charges ₹500. At a fictional 2% monthly simple model rate, principal interest is ₹400. Charging 2% on ₹20,500 gives ₹410, including ₹10 from the prohibited additional base on these assumptions.
Illustrative example 4: Minimum-payment diagnostic
Assume the period’s model interest is ₹400 and the relevant taxes/other charges ₹100. These total ₹500. A proposed minimum payment of ₹300 falls ₹200 short of that model amount and requires review against the no-negative-amortisation rule. Paying ₹500 would not itself extinguish the ₹20,000 principal in the example.
Illustrative example 5: Explicit day-based interest assumption
Under a fictional simple model of 18% yearly interest, a constant eligible principal of ₹20,000 for thirty days on an actual/365 basis produces ₹295.89, rounded to paise. This verifies only that stated model. A real card may use a different disclosed method and credit sequence; the three-day late-charge test does not automatically remove three interest days.
Illustrative example 6: One-month notice calendar
Assume a charge-change notice is validly given on 10 October 2026 and the stated effective date is 10 November. The calendar-month interval is thirty-one days. Treating every month as thirty days would give a different diary date; actual notice and applicability must still be verified.
Ten-step verification table
| Step | Action | Evidence |
|---|---|---|
| 1 | Confirm issuer and card | Identify the applicable directions and product. |
| 2 | Read statement and terms | Retain APR, due date and calculation method. |
| 3 | Establish past-due status | Check the relevant payment and minimum-payment facts. |
| 4 | Count days correctly | Distinguish exactly three from more than three. |
| 5 | Trace ledger credits | Record actual payment, refund and reversal dates. |
| 6 | Reconcile outstanding base | Separate original bill from the remaining balance. |
| 7 | Separate charge balances | Identify unpaid taxes, levies and charges. |
| 8 | Test minimum-payment design | Review negative amortisation against the actual model. |
| 9 | Verify change notices | Check prospective effect and the calendar-month requirement. |
| 10 | Document disputes | Provide a reproducible calculation without inventing a rate or compensation rule. |
Sixteen practitioner FAQs
1. Is the three-day rule a universal interest-free extension?
No. Interest and the late-charge/CIC past-due test are separate provisions.
2. Does exactly three days satisfy more than three?
No. Distinguish the equality boundary.
3. When are days past due computed from?
The payment due date in the statement under the stated direction and related framework.
4. Does the fee calculation simply start after an extra three days?
Do not assume that. The direction expressly refers back to the statement due date.
5. Is the original bill always the late-charge base?
No. The rule uses outstanding amounts after the due date.
6. Do credited refunds matter?
Yes. Adjust outstanding amounts for the specified credits as and when credited.
7. Is a refund promise the same as a posted credit?
No. Establish actual ledger timing.
8. Is there a single RBI-mandated monthly rate here?
No. Read the issuer’s disclosed rate and methodology.
9. Can unpaid taxes or charges attract further interest or charges?
Paragraph 23(2) prohibits that capitalisation as stated.
10. Does paying only the minimum fully repay principal?
No. It can leave principal outstanding and stretch repayment.
11. Does paying only the minimum necessarily preserve interest-free credit?
No. The directions require disclosure of suspension when a prior bill balance remains outstanding.
12. Can a fictional model rate be treated as the customer’s contractual rate?
No. Use it only to verify the stated illustration.
13. Must all cards use actual/365 simple interest?
No such universal requirement is claimed here.
14. Can charges change retrospectively?
Paragraph 23(7) specifies prospective changes with at least one month’s prior notice.
15. Is every calendar month thirty days?
No. Preserve actual dates when applying the notice rule.
16. Does this exact direction govern every issuer category?
No. Check the defined commercial-bank scope and any other applicable directions.
Conclusion
RBI separates late-charge eligibility from interest calculation. Verify the past-due clock, adjust outstanding amounts for credits and test that unpaid taxes and charges do not themselves attract further charges.