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Disclosure & disclaimer
How this site works, where the numbers come from, and what it is not.
Not tax advice
EstQuarterly is an educational planning tool. It does not create a client relationship and is not tax, legal, or financial advice. The estimated-tax safe harbor follows IRC §6654 and IRS Form 2210 & Publication 505, but your facts may differ. Verify with the IRS instructions or a qualified tax professional before making a payment.
Accuracy
Calculations run entirely in your browser using the rules described on the site. We aim for accuracy but make no guarantee; figures may be rounded and rules can change. We do not store or transmit anything you enter.
Affiliate links
Some outbound links (for example to tax-preparation or bookkeeping software) may be affiliate links: if you sign up through them we may earn a commission at no extra cost to you. This never changes the calculation or our recommendations, and the tool is free to use either way. Display advertising may also appear.