Taxes must be paid as you earn or receive income during the year, either through withholding or estimated tax payments. If the amount of income tax withheld from your salary or pension is not enough, or if you receive income such as interest, dividends, alimony, self-employment income, capital gains, prizes and awards, you may have to make estimated tax payments. If you are in business for yourself, you generally need to make estimated tax payments. Estimated tax is used to pay not only income tax, but other taxes such as self-employment tax and alternative minimum tax. If you don’t pay enough tax through withholding and estimated tax payments, you may have to pay a penalty. You also may have to pay a penalty if your estimated tax payments are late, even if you are due a refund when you file your tax return.
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