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Freelancers: How to Catch Up on Estimated Taxes Before September’s Deadline

26 Aug

Freelancers: How to Catch Up on Estimated Taxes Before September’s Deadline

by calum
in Uncategorized
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As a freelancer or self-employed professional, managing your own taxes comes with the territory. Unlike traditional employees, you don’t have income tax automatically withheld from your pay—so you’re expected to make estimated tax payments throughout the year.

If you’ve fallen behind on these payments, you’re not alone. Life gets busy, income can fluctuate, and taxes often fall to the bottom of the to-do list. But with the September 16, 2025 quarterly deadline approaching, now is the perfect time to catch up and get back on track—before penalties start adding up.

Here’s how to bring your estimated taxes up to date and avoid costly surprises.

What Are Estimated Taxes?

Estimated taxes are quarterly payments made to the IRS to cover your income tax and self-employment tax, which includes contributions to Social Security and Medicare. The IRS expects you to pay as you earn, rather than waiting until the end of the year.

The quarterly payment schedule for 2025 is:

  • April 15, 2025 – Q1

  • June 16, 2025 – Q2

  • September 16, 2025 – Q3

  • January 15, 2026 – Q4

If you missed a previous deadline or haven’t paid anything yet, you’ll need to make a catch-up payment before September to reduce your liability and potential penalties.

Why It’s Important to Pay by September

Falling behind on estimated taxes can lead to underpayment penalties and interest, especially if your income has been steady or growing. The longer you wait to pay, the more those penalties can increase.

By making a payment before the Q3 deadline on September 16, you:

  • Limit the penalties for earlier underpayments

  • Stay compliant with IRS expectations

  • Spread your tax liability more evenly before year-end

  • Avoid a large, unmanageable tax bill next April

How to Calculate What You Owe

To catch up, you need to figure out what you’ve earned so far this year and estimate your total income and tax liability.

Here’s a simple way to do it:

  1. Add up your year-to-date income from all sources: client work, commissions, tips, affiliate income, etc.

  2. Subtract eligible business expenses to get your net income.

  3. Use IRS Form 1040-ES or a Tax Refund Calculator to estimate your total tax liability for the year, including self-employment tax.

  4. Divide your annual tax liability by four to find your quarterly payment amount.

  5. If you missed one or both earlier payments, catch up by paying the missed amount along with your Q3 payment.

Alternatively, work with an accountant or use bookkeeping software that includes estimated tax features to avoid manual calculations.

What If You Can’t Pay Everything Now?

If you’re behind and can’t afford to pay everything you owe, pay as much as you can by the September deadline. The IRS calculates penalties based on the amount unpaid, so making a partial payment now will reduce what you owe in interest later.

Then, plan ahead for the final 2025 estimated payment in January by setting aside a percentage of future income to cover what’s still outstanding.

Keep Better Records Going Forward

Accurate bookkeeping is key to staying on top of estimated taxes. Make sure you’re tracking:

  • Invoices and payments received

  • Business expenses (software, subscriptions, equipment, travel)

  • Mileage and home office costs, if applicable

  • Quarterly tax payments made

Cloud-based accounting tools or freelancer-specific apps can help you automate this process so you’re always aware of where you stand.

Consider Adjusting Your Estimated Payments

If your income is inconsistent or seasonal (which is common for freelancers), it’s a good idea to adjust your estimated payments each quarter based on actual income. You don’t have to pay the same amount every quarter—just ensure you’re covering your fair share as income comes in.

You can also use the safe harbor rule: as long as you pay 100% of your prior year’s total tax bill (or 110% if your income was over $150,000), you may avoid underpayment penalties—even if you owe more this year.

Don’t Wait Until April

Many freelancers make the mistake of underpaying during the year and hoping to “catch up” in April. This not only creates financial stress but can also trigger IRS penalties.

By catching up now and planning ahead for the final quarter, you can reduce stress, avoid fines, and stay in control of your finances. Use tools like the Tax Refund Calculator to get a clear picture of where you stand—and how much you need to pay.

Getting back on track with estimated taxes doesn’t have to be overwhelming. With the September deadline just around the corner, taking action today can help you avoid penalties and set yourself up for a smoother tax season next year.