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Zero-decimal currencies

Most currencies have a smallest unit worth one hundredth of the major unit, like a cent of a dollar. A handful do not, and SSA scales those differently so the figures on screen stay correct.

What a zero-decimal currency is

A zero-decimal currency has no fractional subunit worth using: its smallest unit already is one whole unit, unlike a currency such as USD where the smallest unit is a cent, one hundredth of a dollar. SSA recognizes sixteen of them:

  • JPY (Japanese yen)
  • KRW (South Korean won)
  • VND (Vietnamese dong)
  • BIF (Burundian franc)
  • CLP (Chilean peso)
  • DJF (Djiboutian franc)
  • GNF (Guinean franc)
  • KMF (Comorian franc)
  • MGA (Malagasy ariary)
  • PYG (Paraguayan guarani)
  • RWF (Rwandan franc)
  • UGX (Ugandan shilling)
  • VUV (Vanuatu vatu)
  • XAF (Central African CFA franc)
  • XOF (West African CFA franc)
  • XPF (CFP franc)

How SSA scales them

Internally, SSA stores every amount as a whole number in the currency's smallest unit, the same way Stripe does. For an ordinary currency that number is divided by 100 before it is shown, since 100 cents make a dollar (or euro, or pound). For a zero-decimal currency, SSA divides by 1 instead: the stored number already is the amount in whole units, so nothing is scaled down and no decimal point is added.

This matters mainly if a figure ever looks off by a factor of 100. If your store's currency is one of the sixteen above and a total looks a hundred times too small or too large somewhere, that usually means an amount was scaled as though it had cents when it does not (or vice versa), rather than SSA reporting the wrong revenue.

Where this shows up

The clearest place to see it is Target MRR in Settings, then General: on a JPY site, typing 500 sets a target of five hundred yen, not five hundred yen's worth of cents. Every other currency field behaves the same way: for a zero-decimal currency, the number you type or read is already the whole amount.

Currency conversion is unaffected by any of this: a zero-decimal currency still converts to your majority currency at the current exchange rate exactly like any other currency; only the scaling of its own smallest unit is different.