Base Currency Rates

This setting in the System module is only used by the Dual-Base system. Having entered the Currencies used in your business using the Currency register and defined your two Base Currencies using the Base Currency setting, an exchange rate between the two should now be entered.

If there is a fixed exchange rate between the two Currencies, a single record expressing that relationship should be entered to this setting. Otherwise, each time the exchange rate changes, you should enter a new record to the setting rather than modifying an existing record. This ensures an accurate history will be created which will then be used when currency conversions are required when producing reports.

This setting should only be used for exchange rates between the two Base Currencies. All other exchange rates should be stored in the Exchange Rate register in the System module.

Double-clicking 'Base Currency Rates' in the 'Settings' list in the System module brings up the 'Base Currency Rates: Browse' window, showing exchange rates already entered. Click the [New] button in the Button Bar to enter a new record, or select an exchange rate similar to the one you want to enter and click [Duplicate] on the Button Bar.

The 'Base Currency Rate: New' window is shown, empty if you clicked [New] or containing a duplicate of the highlighted exchange rate. In the case of the duplicate, the Date of the new record will be the date of the copied record.

Paste Special    Current Date
The earliest date for which the exchange rate is valid.

The current exchange rate is that with the most recent date: this will be used as a default when entering new transactions.

Base Currency 1, Base Currency 2
Use these two fields to specify the exchange rate, which should be entered as a ratio. In the example illustration, 0.63 units of Base Currency 1 (Pounds Sterling) will buy one of Base Currency 2 (the Euro). Note that if either Base Currency is the Euro, EMU regulations state that the ratio must always show how many units of the other Currency can be bought with one Euro.


When an exchange rate changes, always create a new record in the Base Currency Rates setting. Do not change an existing record.