GST on forex conversion applies only on the service value under Rule 32(2), not on the gross amount ā here is how the slab method actually works.
Every time you exchange foreign currency at an Indian bank, money changer or forex card vendor, GST is levied on the service component ā not on the gross value of the currency exchanged. The valuation rule under Rule 32(2)(b) of the CGST Rules has been the subject of confusion among travellers, importers and remitters since its inception. Recent CBIC clarifications and 2026 reforms have streamlined the calculation, but a clear understanding still pays off in negotiation with your forex provider.
What GST Applies On
The taxable supply is the service of converting one currency into another ā not the principal amount of currency you receive or send. The bank or money changer charges a margin (the difference between buy and sell rates) and adds a service fee; GST is levied on this composite service value, computed under one of two methods prescribed in Rule 32(2).
Two Valuation Methods under Rule 32(2)
Banks and authorised forex dealers can choose between:
- Method 1 ā Difference between buy/sell rate and RBI reference rate: the value of the supply is the difference between the bank's transaction rate and the RBI reference rate, multiplied by the total currency exchanged.
- Method 2 ā Slab-based valuation: a fixed percentage of the gross amount of currency exchanged, with stepped slabs.
The Slab Method in Practical Terms
Method 2, which most banks and forex dealers use for retail customers, computes the taxable value as:
- 1% of the gross amount of currency exchanged, subject to a minimum of ā¹250, for amounts up to ā¹1 lakh.
- ā¹1,000 plus 0.5% of the gross amount exceeding ā¹1 lakh, for amounts between ā¹1 lakh and ā¹10 lakh.
- ā¹5,500 plus 0.1% of the gross amount exceeding ā¹10 lakh, subject to a maximum of ā¹60,000, for amounts above ā¹10 lakh.
GST at 18% applies on this taxable value. Note: thresholds and rates should always be cross-checked with the latest CBIC notification before any high-value transaction.
Worked Example ā Method 2
Suppose you remit ā¹3 lakh equivalent to a foreign destination. The taxable value would be ā¹1,000 plus 0.5% of ā¹2 lakh (the amount above ā¹1 lakh), i.e., ā¹1,000 + ā¹1,000 = ā¹2,000. GST at 18% on ā¹2,000 = ā¹360. The total GST cost on a ā¹3 lakh remittance is just ā¹360 under this method ā far less than the headline 18% on the gross amount that customers often fear.
Common Misunderstandings
Three things confuse customers. First, the notion that 18% GST applies on the full forex amount ā it does not, only on the service value. Second, that the buy-sell spread itself is GST-free ā it is not; the spread is one of the inputs to the valuation. Third, that the same rate applies to corporates and individuals ā corporates can claim input tax credit if the forex is for business purposes, while individuals cannot.
Documentation You Should Keep
For every forex transaction above ā¹50,000, ensure you receive:
- Tax invoice from the bank or authorised dealer showing taxable value, GST rate and GST amount.
- A separate forex transaction receipt linking the invoice to the FEMA-permissible purpose.
- Form 15CA/15CB where required for foreign remittances under the Income-tax Act.
- LRS declaration if you are sending money under the Liberalised Remittance Scheme.
When Input Tax Credit Is Available
Businesses paying GST on forex conversion can claim ITC if the transaction is for business purposes ā for example, an importer paying for raw materials in dollars, a tech company paying SaaS subscriptions abroad, or a consultant remitting fees received in foreign currency. Personal forex transactions ā leisure travel, student fee payments, family remittances ā do not qualify for ITC and the GST is a final cost.
Special Cases: Cards, LRS and Cross-Border Cards
Beyond bank counter transactions, forex GST shows up in several less-obvious places. Prepaid forex cards loaded for travel attract GST on the loading-margin component. International credit card spends abroad have an embedded forex conversion charge that is subject to GST, in addition to TCS under Section 206C(1G) of the Income-tax Act on LRS-categorised payments. Cross-border SaaS subscriptions paid in foreign currency attract GST on the conversion service even when the underlying service is OIDAR-taxed separately.
- Prepaid forex cards: GST on the loading-margin slab value.
- Credit card spends abroad: GST on conversion charge + TCS under 206C(1G).
- LRS remittances: GST on conversion + TCS as per category.
- SaaS subscriptions: GST on forex margin (separate from OIDAR/RCM treatment).
- Always insist on a tax invoice from the bank or card issuer for ITC eligibility.
Conclusion
GST on foreign exchange conversion is far smaller than headline numbers suggest, but it is real. Know which valuation method your bank applies, ask for the tax invoice, plan your remittance in size-tiers that benefit from the slab structure, and claim ITC where the transaction is genuinely a business expense. Treat forex as a measurable cost line, not a hidden one, and your effective remittance cost will improve.
