There’s a Reddit post that goes semi-viral every few months: “Self-employed for 4 years, just got hit with an $8,000 IRS penalty.” The comments are always a mix of sympathy and “yeah, you were supposed to pay quarterly.” And the poster is always, understandably, furious — because no one ever told them. So let’s be the ones who tell you.
When you have a W-2 job, your employer sends a piece of every paycheck to the IRS for you, all year long. By the time you file, the bill’s mostly paid. The IRS is addicted to that pay-as-you-go rhythm.
So when you’re self-employed and nobody’s withholding for you, they expect you to do it yourself — four times a year. That’s estimated taxes. Skip them and the IRS doesn’t just want the tax; they tack on an underpayment penalty, basically interest for making them wait. That’s how a normal bill quietly becomes an $8K gut-punch. (If the whole 1099 thing is new, start with going from W-2 to 1099.)
For the 2026 tax year, estimated payments are due:
Yes, the “quarters” are weird and uneven. Just know the dates. If one lands on a weekend or holiday, it bumps to the next business day.
Here’s the shortcut the pros use. You don’t have to predict your income perfectly — you just have to hit one of two “safe harbors,” and the penalty disappears:
That second one is the cheat code. If last year’s total tax was $12,000, split it into four $3,000 payments, send them on the dates above, and you’re penalty-proof — even if you have a monster year. You’ll settle the difference in April, but no penalty.
Brand new with no “last year” to lean on? Fall back to the set-aside method: stash 25-30% of your net income (income minus business expenses) and pay a quarter of your running estimate each deadline. If you rent a booth or suite, your rent and supplies are deductions that shrink that number.
Don’t forget your state usually wants estimated payments too, on a similar schedule. People remember the feds and get surprised by the state bill. Check yours.
A lot of people do know about quarterly taxes, but they guess wildly, underpay all year, and still get penalized — or they overpay and hand the government an interest-free loan while they’re personally broke. Both happen for the same reason: you can’t pay the right amount if you don’t know what you’re making and spending in real time. Quarterly taxes aren’t hard math. They’re a tracking problem wearing a math costume.
Quarterly taxes feel scary because they show up as a surprise. Take away the surprise and they’re just four small, boring payments. Boring is the goal.
Connect your income and Toozi tells you the exact number to send each quarter — and nudges you before each deadline so you’re not scrambling at 11:59 PM on the 15th.
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