Estimated Tax Payment Calculator — Your IRS Payment Amounts
By Sanjeet Singh, CPA
The IRS requires quarterly estimated tax payments if you expect to owe $1,000 or more. Get your dollar amounts here.
Annual tax calculators give you one big number at year-end. Qalm breaks down your estimated tax into four quarterly payments, so you know exactly what to send to the IRS in April, June, September, and January.
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Enter your income to see your tax estimate.
What Are Estimated Taxes?
Estimated taxes are the payments self-employed people, freelancers, and others with non-withheld income make to the IRS throughout the year. Instead of paying your entire tax bill in April, the IRS expects you to pay as you earn — roughly four times a year.
The concept is straightforward: the U.S. tax system is "pay as you go." W-2 employees pay as they go through paycheck withholding. Self-employed people pay as they go through quarterly estimated tax payments. The IRS wants the money throughout the year, not in one lump sum.
You generally need to make estimated payments if you'll owe $1,000 or more in federal taxes after subtracting withholding and refundable credits. For most freelancers, contractors, gig workers, and landlords, that threshold is crossed quickly.
How to Calculate Your Estimated Tax: A Worked Example
Let's walk through a real calculation for a single freelance graphic designer in California with $85,000 in gross income and $15,000 in business expenses.
Step 1 — Net self-employment income: $85,000 gross minus $15,000 expenses = $70,000 net.
Step 2 — Self-employment tax: $70,000 × 92.35% = $64,645 (the adjusted amount). Then $64,645 × 15.3% = $9,891 in SE tax. Half of that ($4,945) is deductible from adjusted gross income.
Step 3 — Adjusted gross income: $70,000 income minus $4,945 SE tax deduction = $65,055 AGI.
Step 4 — Taxable income: $65,055 AGI minus $15,000 standard deduction (single filer, 2025) = $50,055 taxable income.
Step 5 — Federal income tax: Running $50,055 through the 2025 brackets — 10% on the first $11,925 ($1,193), 12% on $11,926-$48,475 ($4,386), and 22% on $48,476-$50,055 ($348) — gives approximately $5,927 in federal income tax.
Step 6 — Total federal tax: $5,927 income tax + $9,891 SE tax = $15,818.
Step 7 — California state tax: Approximately $2,800 (California has its own progressive brackets).
Step 8 — Total estimated tax: $15,818 federal + $2,800 state = approximately $18,618 for the year.
Step 9 — Quarterly payment: $18,618 ÷ 4 = approximately $4,655 per quarter.
Set-aside rate: $18,618 ÷ $70,000 net income ≈ 26.6%. This freelancer should set aside about 27% of every payment.
The free calculator at the top of this page does this entire calculation instantly. Enter your numbers and see your results without doing the math manually.
The Estimated Tax Calculation Methods
Standard Method (Most Common)
Estimate your total tax for the year, subtract withholding, divide by four. This is what most people use and what the calculator on this page provides. It works well when your income is relatively consistent throughout the year.
Annualized Income Installment Method
If your income varies significantly by season or quarter — maybe you earn most of your money in Q3 and Q4 — the annualized method lets you calculate each quarter's payment based on actual income earned that period. This prevents overpaying in slow quarters.
This method requires completing Schedule AI of Form 2210 when you file. It's more work, but it can save you from tying up money in early-year payments when you haven't earned much yet.
Safe Harbor Method
The simplest approach to avoid penalties: pay at least 100% of last year's total tax through estimated payments and withholding. If your prior-year AGI exceeded $150,000, pay 110% of last year's tax.
This doesn't minimize your payments — you might overpay and get a refund — but it guarantees no underpayment penalty. For people with unpredictable income, the peace of mind is worth it.
When Estimated Payments Are Due
The four payment deadlines for estimated taxes are: April 15 (for Q1 income, January-March), June 15 (for Q2, April-May), September 15 (for Q3, June-August), and January 15 of the following year (for Q4, September-December).
If a deadline falls on a weekend or holiday, it shifts to the next business day. The "quarters" are uneven — Q2 is only two months, Q4 is four months — so your actual income per period may not match the equal quarterly payment amount.
How to Make Your Payments
The fastest and easiest method is IRS Direct Pay at irs.gov/directpay. Select "Estimated Tax," choose Form 1040-ES, enter the tax year and your payment amount. It's free and provides instant confirmation.
For state estimated taxes, check your state's department of revenue website. Most states offer a similar online payment portal. California uses the Franchise Tax Board website, New York uses the DTF website, and so on.
Set a recurring calendar reminder one week before each deadline. Some people open a dedicated savings account, transfer their set-aside percentage after every client payment, and pay the IRS from that account each quarter. This system prevents last-minute scrambling.
Frequently Asked Questions
How much estimated tax do I owe?
It depends on your total income, business expenses, filing status, and state. The calculator on this page gives you a personalized estimate based on your actual numbers. As a rough guideline, most self-employed people owe between 25% and 35% of their net income in combined federal and state taxes — but the actual percentage varies significantly based on your situation.
What if I overestimate and pay too much?
If your estimated payments exceed your actual tax when you file, the IRS refunds the difference. There's no penalty for overpaying. Some people deliberately overpay slightly to avoid any risk of underpayment penalties — they'd rather get a refund than owe a penalty.
Do I pay estimated tax on gross income or net income?
Net income — your gross income minus deductible business expenses. Business expenses reduce both your income tax and your self-employment tax, so tracking and deducting them is especially important.
What if I also have a W-2 job?
Your W-2 withholding counts toward your total tax payment. You only need to make estimated payments on the gap between your total tax and what your employer withholds. If your W-2 withholding covers most of your tax bill, your quarterly payments may be small or unnecessary. The calculator factors this in automatically when you enter your W-2 income and withholding.
What happens if I don't pay estimated taxes?
The IRS charges an underpayment penalty — essentially interest at approximately 8% annually on the amounts that should have been paid each quarter. The penalty is proportional, not a flat fine. For most people who are one or two quarters behind, it amounts to a few hundred dollars.
Do I pay estimated tax on gross or net income?
Net income — gross minus deductible business expenses. Tracking deductions reduces both income tax and SE tax.
Related Calculators
Need the full picture?
Combine W-2, freelance, and rental income into one complete tax estimate with our full calculator.