Crystallisation of Export Bills
When an export bill goes unpaid, the bank turns the currency risk back into a rupee debt. Here is how.
When a bank purchases, discounts or negotiates an export bill, it pays the exporter rupees up front and waits for the foreign currency to arrive from abroad. If the buyer does not pay by the due date, the bank is left holding a foreign currency claim it has already funded in rupees. Crystallisation is the step where the bank converts that foreign currency liability of the exporter into a rupee liability, so the exchange risk passes back to the exporter.
From that point the exporter owes the bank a fixed rupee amount plus interest and charges, whatever the rupee does next. If the bill is paid later, the proceeds are converted and set off against that rupee debt.
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The Fixed 30th-Day Rule Is Out of Date
Older study notes, written to earlier editions of the FEDAI Rules, give a fixed day for crystallisation, commonly the 30th day after the due date. The current 10th edition (effective 1 April 2019, updated to May 2025) does not fix a day. Each bank must frame its own crystallisation policy and make it transparently available to customers. If an exam question offers a bank-policy option, that matches the current rule.
How an Unpaid Export Bill Is Crystallised
- 1
Bill purchased or negotiated
The bank converts at its bill buying rate, or the forward contract rate if the exporter has booked one, and recovers interest for the normal transit period or usance period up front.
- 2
Due date passes unpaid
Overdue interest runs from the end of the normal transit period for demand bills, or from the notional or actual due date for usance bills.
- 3
Crystallisation under the bank's policy
The bank converts the foreign currency amount at its TT selling rate on the crystallisation date. The exporter now owes that rupee sum plus interest and charges.
- 4
Interest recovered
Interest for the overdue period is recovered on the crystallisation date, and thereafter until the crystallised amount is repaid.
- 5
Late realisation
If the proceeds arrive after crystallisation, the bank converts them at its TT buying rate, or the contracted rate if any, and adjusts the rupee liability.
Which Rate Applies at Each Stage
| Event | Rate under FEDAI Rules |
|---|---|
| Export bill purchased, discounted or negotiated | Bill buying rate, or contracted rate |
| Unpaid bill crystallised | TT selling rate on the crystallisation date |
| Proceeds realised after crystallisation | TT buying rate, or contracted rate |
| Bill dishonoured before crystallisation | Rupee equivalent of the bill and foreign charges at TT selling rate, plus interest and rupee charges |
| Bill sent on collection, proceeds received | TT buying rate or contracted rate, only after credit to the bank's nostro account |
| Import bill under LC retired or crystallised | Hedge contract rate if booked, otherwise the bill selling rate |
Rates, transit periods and overdue bills. No signup.
Why the Selling Rate
The bank bought the foreign currency from the exporter on day one and paid rupees. When the bill fails, that currency is not coming in, so the exporter in effect has to buy the same amount of foreign currency from the bank to settle the claim. That is a sale by the bank, and the exporter bears its cost, which is why crystallisation uses the bank's TT selling rate, not a buying rate. A question that offers 'TT buying rate' for crystallisation is testing exactly this logic.
Terms That Set the Clock
- Normal transit period (NTP)
- The average time from negotiation to receipt of proceeds, not the time goods take to arrive. Under FEDAI Rule 2.3 it is 25 days for foreign currency sight bills not under an LC and 20 days for rupee bills not under an LC. A bank may vary it with documented reasons, but finance on an extended NTP cannot go beyond 90 days from shipment.
- Notional due date
- For a usance bill whose due date is not fixed, the due date the bank works out from the transit and usance periods. Overdue interest on such bills runs from this date.
- Externalisation issues
- Where the buyer pays in local currency but the buyer's country does not release the foreign exchange. FEDAI rules say such bills are still crystallised under the bank's policy, even if a local-currency payment advice has been received.
How CCFE Tests This
Expect rate questions (which rate on crystallisation, which on later realisation) and timing questions. Many question banks still carry the fixed-day answer from older courseware, so read the stem: if it cites current FEDAI rules or offers 'as per the bank's policy', choose that. The other trap is the normal transit period, which candidates confuse with shipping time.
FAQs
What is crystallisation of export bills?expand_more
Converting an unpaid export bill's foreign currency amount into a rupee liability of the exporter, at the bank's TT selling rate, so that the exchange risk from that date sits with the exporter.
When are export bills crystallised under FEDAI rules?expand_more
Under the current FEDAI Rules (10th edition), each bank sets its own crystallisation policy for bills unpaid on the due date and must make that policy transparently available to customers. Older notes cite a fixed 30th day.
Which exchange rate is used for crystallisation?expand_more
The bank's TT selling rate on the date of crystallisation. If proceeds arrive later, they are converted at the TT buying rate or the contracted rate.
Are import bills also crystallised?expand_more
Yes. Unpaid foreign currency import bills under letters of credit are crystallised as per the bank's stated policy, at the hedge contract rate if one exists, otherwise at the bill selling rate.
Next steps
- Merchant Ratesarrow_forward
- Post-shipment financearrow_forward
- FEDAI Rulesarrow_forward
- Export Realisationarrow_forward
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