If you’re self-employed or earn income that nobody withholds taxes from, you’ve probably heard you’re supposed to pay “quarterlies.” They sound intimidating, but the idea is simple: the tax system runs on pay-as-you-go, and estimated payments are just how you keep up when there’s no employer doing it for you.
Who actually owes them
Generally, if you expect to owe a meaningful amount at tax time and don’t have enough being withheld — freelancers, gig workers, business owners, landlords, and people with big investment income — you’re in estimated-tax territory.
Four payments, four deadlines
Estimated taxes are due roughly four times a year, in April, June, September, and January. Marking those dates on your calendar in advance is half the battle — missed deadlines, not the amounts, are what usually trip people up.
How to estimate the amount
The goal is to pay in enough across the year to cover what you’ll owe. Many people base each payment on their expected profit, setting aside a percentage as they earn so the money is already there when the deadline arrives.
The safe-harbor shortcut
You don’t have to predict the future perfectly. The IRS offers “safe harbor” rules — generally, if you pay in at least what you owed last year (a bit more for higher incomes), you avoid the underpayment penalty even if you end up owing more. It’s a helpful floor to aim for.
How to pay
You can pay online directly to the IRS in a few minutes, and most states have their own estimated payments too. Keep a record of each payment — you’ll report them on your return so you get credit for what you sent.
What happens if you skip them
Skipping estimated payments doesn’t just mean a big bill in April — it can add an underpayment penalty on top. The fix is rarely complicated; it just needs a plan. Setting one up once means never being surprised again.
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