The Internal Revenue Service accepts electronic funds withdrawal, personal checks, money orders and credit-debit card payments for quarterly payments against estimated taxes due. Estimated taxes are filed and paid quarterly for income that is not subject to withholding including alimony, interest, dividends, prizes and self-employment income.
The IRS may impose a penalty if sufficient tax is not paid through either withholding or estimated tax payments, even if a refund is due when taxes are filed for the year. The penalty may be waived if the failure to pay was the result of casualty, disaster, or other unusual circumstance. In all cases, payment may be made by personal check.