PTAX and BRL Exchange Rate
When a site quotes 'the dollar at X reais,' it is citing just one of several exchange rates that exist in parallel: the Central Bank's official PTAX, the commercial rate banks trade at, and the retail tourism rate charged over the counter. This page explains how PTAX is calculated and why the rate you actually pay on a card never matches it exactly. The tool itself always fetches the current day's bulletin at query time.
The day's last bulletin, FECHAMENTO PTAX, is the one that becomes the Central Bank's official reference rate.
BRL is the bulletin's own reference currency, so quoting it against itself makes no sense; the accepted list covers AUD, CAD, CHF, DKK, EUR, GBP, JPY, SEK, and USD.
Queries before that date return no bulletin, since the Central Bank's series did not exist yet, so the tool rejects the date before even attempting a lookup.
Because exchange rates move over time and the number only makes sense when read together with the effective reference date. On weekends, holidays or gaps in updates, the displayed value may reflect the last valid business-day quote rather than a fresh real-time trade.
Not exactly: PTAX is the Central Bank's official closing bulletin, built from the day's interbank trades; the commercial rate banks quote starts from PTAX but adds each institution's own spread, so two banks can charge slightly different rates on the same day.
Because the card network converts the purchase using the statement date's rate, adds its own currency spread, and the operation is still hit by IOF, the tax on financial operations, so the final amount lands above both PTAX and the commercial rate for that same purchase date.
Nine: US dollar, euro, British pound, Japanese yen, Swiss franc, Australian dollar, Canadian dollar, Swedish krona, and Danish krone, each identified by its three-letter ISO 4217 code.
The Central Bank bulletin series this tool can query starts on November 28, 1984; dates before that return no bulletin because the series simply did not exist yet.
Exchange rate of selected currencies against the Brazilian Real on a given date.
Weekends and holidays return the latest available bulletin.
Looked up in real time through J-Kit's secure backend, with validation, timeout and rate limiting. Nothing is stored on your device. Source: official Brazilian public data.