Primary account currency
Unless paying for currency-specific charges such as project, contest, or upgrade fees, you will incur charges in your selected primary account currency.
Here is how to set it:
1. Click your profile picture from the main menu bar, and select User Settings under Account.
2. Select the Payment & Financials tab.
3. Under the Finance Settings section, select your preferred currency from the My Currency dropdown menu.
4. Click Save Settings to finish.