Ads served in Yandex.Direct are payed for when users clicks on your ads. Your ads start displaying after they pass moderation and funds are added to your campaign's account.
Funds are deducted from your account for every click on your ad or vCard. The minimum cost per click is 0.01 USD/EUR before VAT (values for other currencies). The minimum total payment is 10 USD/EUR before VAT (values for other currencies).
You can find information about factors that influence the price per click and how to set the CPC manually in Step 3. Set your Cost Per Click section.
To estimate approximate expenses on advertising based on the subject matter of your Yandex.Direct ad, please use the Budget Forecast instrument.