My Account — Additional words
If you have a Freelance or Group account with a monthly word limit, in the Additional words tab screen, you can buy additional words for your current subscription.
Procedure. Adding additional words
Select Configuration > My account > Additional words.
From the Number of additional words dropdown, select the number of required words.
The cost is displayed in GBP £ , Euros €, and US $. Select your currency and, at the bottom of the page, select the Buy button. Then, enter your credit card details.