A Simple System for Tracking Quarterly Estimated Taxes
If you're self-employed or run a small business, taxes aren't withheld from your income the way they are from a
paycheck. Instead, the IRS expects you to pay estimated taxes four times a year. Miss a payment or underpay
significantly, and you can end up owing penalties on top of the tax itself. Here's a straightforward system to stay
ahead of it.
Know your due dates
Estimated tax payments are generally due four times a year, roughly in mid-April, mid-June, mid-September, and mid-
January of the following year. The exact dates shift slightly year to year when they land on a weekend or holiday, so
it's worth confirming the current dates each year rather than assuming.
Set aside a percentage with every payment you receive
The single most effective habit: the moment a client payment or sale hits your account, immediately move a
percentage of it into a separate savings account earmarked only for taxes. Many small business owners use
somewhere in the 25–30% range as a starting point, covering both income tax and self-employment tax, then adjust
based on their actual effective rate once they've filed a full year.
This turns tax payments from a quarterly scramble into simply transferring money you've already set aside.
Base your payments on real numbers, not guesses
Each quarter, look at your actual profit for the year so far (income minus business expenses) and estimate your tax
liability based on that, rather than guessing a round number. If your business is seasonal or growing quickly, your
estimate should be revisited each quarter rather than set once in January and left alone — a big Q3 doesn't just
affect Q3's payment, it should adjust your remaining estimates too.
Keep the paperwork trail as you go
Save receipts and categorize expenses monthly rather than at tax time. This does two things: it keeps your running
profit number accurate for your quarterly estimate, and it means you're not reconstructing a year of expenses from
memory in March.
What happens if you underpay
If you pay too little across the year, the IRS can charge an underpayment penalty, calculated based on how much you
owed and how late the payment was. Paying something close to accurate each quarter — even if it's not perfect — will
significantly reduce or eliminate that penalty compared to skipping payments entirely and settling up at filing time.
The bottom line
The owners who find estimated taxes painless aren't the ones with the lowest tax bills — they're the ones who've
automated the habit of setting money aside as it comes in and basing payments on real numbers each quarter.
Want a second set of eyes on your estimated tax approach? Get in touch — we're happy to help you build a system
that fits your business.