If you own a business, work as an independent contractor, or earn any income that isn’t subject to automatic withholding, there’s a rhythm to your tax year that employees never have to think about. Four times a year, you’re expected to send the IRS a payment covering your estimated tax liability for that quarter. Miss those deadlines — or miscalculate the amounts — and you’ll face an underpayment penalty when you file your annual return, plus a larger-than-expected bill in April.
The good news is that estimated taxes don’t have to be stressful or confusing. Once you understand the schedule, the calculation method, and the payment options, it becomes a manageable part of running your business finances. Here’s everything you need to know, organized around the full calendar year.
Who Needs to Make Estimated Tax Payments?
Before getting into the schedule, it’s worth being clear about who this applies to. You’re generally required to make estimated tax payments if you expect to owe at least $1,000 in federal tax for the year after subtracting withholding and credits, and if your withholding and credits will cover less than 90% of the tax you owe for the current year — or less than 100% of the tax you owed last year (110% if your prior year adjusted gross income exceeded $150,000).
In practical terms, this means: sole proprietors, partners in partnerships, S corporation shareholders who receive distributions, independent contractors, freelancers, gig workers, landlords with significant rental income, and investors with substantial capital gains or dividend income.
If you also have a W-2 job alongside your self-employment, you may be able to cover your estimated tax obligation by increasing your withholding at your day job rather than making separate quarterly payments. Talk to a tax professional about whether this approach works for your situation.
The Four Quarterly Deadlines
The IRS divides the year into four estimated tax periods. It’s important to note that these periods are not equal in length — which surprises many first-time self-employed filers.
First Quarter: January 1 – March 31 Payment due: April 15 This covers income earned in the first three months of the year. The April 15 due date coincides with the annual tax filing deadline, which means April is typically the busiest and most financially demanding month for self-employed individuals — you’re filing last year’s return and making your first estimated payment for the current year at the same time. Plan accordingly.
Second Quarter: April 1 – May 31 Payment due: June 16 (adjusted when June 15 falls on a weekend or holiday) Note that the second quarter only covers two months — April and May — not three. This is one of the quirks of the estimated tax calendar that catches people off guard. The gap between the Q1 and Q2 due dates is shorter than expected.
Third Quarter: June 1 – August 31 Payment due: September 15 The third quarter returns to a three-month period covering the summer months.
Fourth Quarter: September 1 – December 31 Payment due: January 15 of the following year The final estimated payment covers the last four months of the year. Importantly, if you file your annual tax return and pay any remaining tax owed by January 31, you can skip the January 15 estimated payment entirely. This option is useful for taxpayers who can get their annual return done quickly.
Note: When any deadline falls on a weekend or federal holiday, it shifts to the next business day. The dates above reflect typical years — always confirm the exact dates on the IRS website for the specific tax year you’re filing.
How to Calculate What You Owe Each Quarter
There are two main methods for calculating your estimated payments, and using the right one for your situation can save you from both overpaying throughout the year and underpaying and facing a penalty.
Method 1: The Safe Harbor Method
This is the simpler of the two approaches and the one most commonly recommended for business owners with variable income. Under the safe harbor rules, you avoid any underpayment penalty as long as your total estimated payments for the year equal either 100% of your prior year tax liability (110% if your prior year AGI exceeded $150,000) or 90% of your current year tax liability — whichever is smaller.
The practical application: take last year’s total tax from your Form 1040 and divide it by four. Pay that amount each quarter. As long as you do this, you won’t be penalized — even if you end up owing significantly more when you file your annual return.
This method is particularly useful when your income is unpredictable. You’re not trying to estimate what you’ll owe this year — you’re simply basing payments on what you already know from last year.
Method 2: The Annualized Income Method
If your income is lumpy — you earn a lot in some quarters and little in others — the annualized income installment method allows you to calculate each quarterly payment based on your actual income for that period, rather than dividing your prior year liability evenly. This can reduce or eliminate quarterly payments in low-income periods while still keeping you in compliance.
This method requires more calculation and uses IRS Form 2210 at filing time, but it can result in meaningfully lower estimated payments in quarters where income was below average.
How to Make Estimated Tax Payments
The IRS offers several convenient payment methods, and all of them are free.
IRS Direct Pay. Available at IRS.gov/payments, Direct Pay allows you to make a payment directly from your checking or savings account with no fees. You don’t need to create an account — you simply verify your identity using information from a prior year return and authorize the payment. Confirmation is immediate.
Electronic Federal Tax Payment System (EFTPS). EFTPS is a free service designed specifically for business tax payments. Unlike Direct Pay, it requires enrollment — but once you’re set up, you can schedule payments in advance, view your payment history, and manage multiple payment types from a single account. Business owners who make estimated payments regularly often prefer EFTPS for its convenience.
IRS2Go App. The IRS’s official mobile app allows you to make payments through Direct Pay directly from your phone.
Credit or Debit Card. The IRS works with third-party payment processors who accept card payments for a fee — typically around 1.85% to 1.99% of the payment amount. This convenience comes at a cost, so most taxpayers use direct bank transfer methods instead.
Check or Money Order. You can still pay by mail. Make the check payable to “United States Treasury,” include your Social Security number or Employer Identification Number, the tax year, and the form type (1040-ES for individual estimated payments), and mail it to the appropriate IRS address for your state. Allow sufficient mailing time before the deadline.
What Happens If You Miss a Deadline or Underpay?
The penalty for underpaying estimated taxes is calculated based on the amount of the underpayment and the number of days it remained unpaid. It’s tied to the federal short-term interest rate plus 3%, which in recent years has been in the range of 7–8% annualized. While it’s not a massive penalty, it adds up — and it’s entirely avoidable.
Penalties are calculated quarter by quarter, which means underpaying in Q1 but catching up in Q2 doesn’t eliminate the Q1 penalty. Each quarter is evaluated independently.
If you realize mid-year that you’ve been underpaying, you can make a larger payment in a subsequent quarter to reduce the overall penalty — but you can’t retroactively fix a prior quarter’s shortfall.
Year-Round Habits That Make Estimated Taxes Easier
The most effective way to handle estimated taxes isn’t to scramble four times a year — it’s to build the habit of setting money aside continuously throughout the year. Here’s what works for most business owners:
Open a dedicated savings account for taxes. Every time income comes in, transfer a fixed percentage — typically 25–30% for federal taxes alone, more if you have significant state tax obligations — into that account immediately. Treat it as untouchable until it’s time to make a payment. This eliminates the shock of large quarterly payments and ensures the money is always there when the deadline arrives.
Use bookkeeping software to track income and expenses in real time. The more accurately you know your net income at any given point, the more confidently you can calculate what you’ll owe.
Review your year-to-date income and payments each quarter before the deadline. A quick comparison of what you’ve earned versus what you’ve paid helps you catch underpayment situations early.
What If You Have Back Estimated Taxes Owed?
If you’ve been self-employed for one or more years and haven’t been making estimated payments — or if the payments you made were significantly less than what you owed — you may have accumulated penalties alongside a larger annual tax bill. These penalties are separate from any failure-to-pay penalties on the annual balance.
Getting current requires filing any back returns, paying or making arrangements for any outstanding balance, and starting a consistent estimated payment schedule going forward. An IRS installment agreement can cover both the back taxes and any associated penalties while keeping you in compliance on an ongoing basis.
The Bottom Line
Estimated tax payments are simply the self-employed version of withholding — the mechanism by which business owners and independent workers pay their taxes throughout the year rather than in one lump sum in April. Once you understand the four deadlines, choose your calculation method, and set up a reliable way to make payments, it becomes a routine part of managing your business finances rather than an annual crisis.
If you’ve fallen behind on estimated taxes or are dealing with an IRS notice related to underpayment penalties, Brightside Tax Relief can help you get back on track and work toward a resolution that makes sense for your situation.
Call us today at 914-214-9127 or visit brightsidetaxrelief.com. Let’s build a tax strategy that works with your business — not against it.
The information in this article is for general educational purposes only and does not constitute legal or tax advice. Every tax situation is unique. Contact a qualified tax professional for guidance specific to your circumstances.
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