Which exchange rate do you use on a foreign-currency invoice?

When you invoice $3,000 from India, these are all different numbers:

• The mid-market rate — what a search engine shows. Nobody transacts at this
• The rate on the day you issue — what your books should record the sale at
• The rate on the day you are paid — what actually converts
• The rate your bank applies — the payment-day rate minus their spread

The gap between the first and last is typically 1–3%. On $60,000 of annual billing that is $600–1,800, which is not a rounding error.

This is general information about how these rules commonly work, not tax advice for your business. Rules change and your circumstances may differ — confirm anything here with your accountant before acting on it.

The rate on the date of issue. That is the point of sale, and it is what your accounts should recognise the revenue at.

Record it *on the invoice, at the time*. Reconstructing it eleven months later from a rate-history site is a poor substitute and a reliable source of disagreement with your accountant.

If you invoiced at ₹83.20 and were paid when the rate was ₹83.90, you received slightly more rupees than the sale was booked at. That difference is a foreign exchange gain — and if it moves the other way, a loss.

In most jurisdictions this is accounted for separately from your trading revenue. It is not extra income from your work; it is a currency movement, and treating it as revenue overstates how much your business earns.

If you bill in three currencies and add the raw totals together, the result is meaningless. Adding 3,000 to 250,000 to 2,500 gives a number with no unit.

Every invoice needs its own converted value, captured at issue, and the reporting reads the converted column. That is the only way an annual revenue figure means anything.

This is precisely why FreelanceOS records the rate per invoice rather than converting at report time — a conversion done later uses a rate that was not true when the sale happened.

Three things that measurably help:

• Compare what actually lands, not the advertised rate. A provider quoting "zero fees" may have a worse spread than one charging a visible fee
• Consolidate receipts. Four transfers of $750 usually costs more in fixed fees than one of $3,000
• Ask about the receiving-side charge. Intermediary bank fees are deducted before the money reaches you and are easy to miss