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Quarterly Estimated Taxes Explained
What quarterly estimated taxes actually are, how to calculate what you owe, and how to pay without getting hit with a penalty.
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Quarterly Estimated Taxes FAQ's
Do I owe quarterly estimated taxes if I'm a new shop and haven't made a profit yet?
If you don't expect to owe at least $1,000 in tax for the year after credits and withholding, you generally aren't required to make quarterly payments. Once your shop turns a real profit, that threshold gets crossed quickly — revisit the calculation each quarter as your numbers change.
What happens if I skip a quarterly payment?
The IRS charges an underpayment penalty calculated like interest on the shortfall, on top of the tax you still owe. It doesn't erase the payment — it just gets more expensive the longer you wait. Verify the current underpayment rate on IRS.gov, since it moves with market interest rates.
Can I just pay everything at once in April instead of quarterly?
You can, but you'll almost certainly owe a penalty for underpayment during the earlier quarters, even if you pay the full amount by the April deadline. The penalty is based on when the money was due, not just whether it eventually got paid.
Is the safe harbor rule always the cheapest option?
Not always — if your income drops significantly from last year, paying based on last year's tax bill could mean overpaying and waiting for a refund. But it's the simplest, lowest-risk method if your income is unpredictable or growing.


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