Quarterly Estimated Taxes for Small Business

How do I pay quarterly estimated taxes? To pay quarterly estimated taxes, calculate your expected annual income tax and self-employment tax, divide by four, and pay each quarter using IRS Form 1040-ES (for individuals/sole props/LLCs) or Form 1120-W (for C-corps). The 2026 deadlines are April 15, June 17, September 16, and January 15 of the following year.

If you earn self-employment income — whether as a freelancer, sole proprietor, single-member LLC owner, partner, or S-corp shareholder — the IRS expects you to pay quarterly estimated taxes on that income throughout the year. Skip the payments and you face underpayment penalties on top of the tax you already owe. This guide walks through who needs to pay, how to calculate the amount, how to send the payment, and how to avoid the most common mistakes.

Who Needs to Pay Quarterly Estimated Taxes?

The IRS requires quarterly estimated taxes if both of the following are true:

• You expect to owe $1,000 or more in federal tax for the year after subtracting withholding and refundable credits
• Your withholding (from a W-2 job, for example) will be less than the smaller of: 90% of your current-year tax bill or 100% of your prior-year tax bill (110% if your prior-year adjusted gross income was over $150,000)

In plain English: if you have meaningful self-employment or business income that is not having tax withheld at the source, you almost certainly need to pay quarterly. Common situations:

• Freelancers and consultants
• Sole proprietors (Schedule C income)
• Single-member LLC owners taxed as sole props
• Multi-member LLC members receiving K-1 income
• S-corp shareholders receiving distributions
• Anyone with significant investment or rental income
• Anyone with side-business income that exceeds a few thousand dollars per year

Quarterly Tax Deadlines

Quarter	Covers Income From	Payment Due
Q1	January 1 – March 31	April 15
Q2	April 1 – May 31	June 15
Q3	June 1 – August 31	September 15
Q4	September 1 – December 31	January 15 of following year

Note the unusual quarter lengths — Q2 covers only two months, Q3 covers three months but ends August 31. Mark all four dates on your calendar with 7-day reminders, and set a second reminder the day before each deadline. When the deadline falls on a weekend or holiday, it shifts to the next business day.

How to Calculate Your Estimated Tax

1. Estimate your total annual income. Self-employment, K-1s, W-2 wages, investment income, rental income — everything.
2. Subtract above-the-line deductions and the standard deduction (or itemized).
3. Apply federal tax brackets to calculate income tax.
4. Calculate self-employment tax. 15.3% on the first $168,600 of self-employment net earnings in 2026 (for Social Security and Medicare), 2.9% on amounts above that.
5. Add additional Medicare tax (0.9% on earnings above $200,000 single or $250,000 married filing jointly).
6. Subtract any expected credits and W-2 withholding.
7. Divide the remaining amount by 4. That is your quarterly estimated tax payment.

The “Safe Harbor” Rule

The IRS provides a safe-harbor rule that protects you from underpayment penalties. You will not owe a penalty if you pay either:

• 90% of your current year’s tax through a combination of withholding and quarterly payments, OR
• 100% of your prior year’s tax (110% if your prior-year AGI was over $150,000)

For most growing small businesses, paying 100% of last year’s tax (110% for higher earners) is the easiest safe harbor — divide last year’s total tax by four and pay that each quarter, regardless of how this year shakes out. If your business income drops, you can reduce the payments mid-year. If income rises significantly, you may want to pay more in Q3 and Q4 to avoid a big bill in April.

How to Pay Quarterly Estimated Taxes

You have several payment options:

• IRS Direct Pay: Free electronic payment from your bank account at irs.gov/payments/direct-pay. The simplest method.
• EFTPS: The Electronic Federal Tax Payment System. Requires enrollment but supports scheduled payments and is the standard for businesses with employees.
• Credit or debit card: Available through third-party processors. Small fee applies (1.85–2.5%).
• Mail check with Form 1040-ES voucher: Slowest method but still accepted.
• Your tax software: Most major tax software (TurboTax, H&R Block, TaxSlayer) can schedule quarterly payments.

The First Year of Quarterly Taxes

The first full year of self-employment is the hardest for quarterly taxes because you have no prior-year baseline. Two approaches work well for first-year founders. The first: estimate conservatively and pay 25–30% of every dollar of net profit each quarter, then reconcile at year-end. The second: pay a small amount each quarter (even $500–$1,000) just to establish a payment habit, then pay any shortfall by April 15 of the following year and accept a small underpayment penalty. The second approach is fine for first-year businesses earning under $30,000 in net profit, where the penalty is genuinely small. For higher-income first-year founders, use approach one and aim for the 90% current-year safe harbor.

State Quarterly Estimated Taxes

Most states with income tax also require quarterly estimated payments. State deadlines and safe-harbor rules usually mirror the federal schedule but have separate forms, separate calculations, and separate online payment portals. States without income tax (Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, Wyoming) do not require state estimated payments — though they may still require quarterly sales tax or franchise tax filings.

Setting Aside Money for Taxes

The biggest practical challenge with quarterly taxes is having the money on hand when the deadline arrives. The simple solution: every time a customer payment hits your business bank account, transfer 25–30% to a separate tax savings account. By the time the quarterly deadline arrives, the money is already set aside. Steps:

1. Open a separate business savings or money-market account. See business bank account for an LLC.
2. Set up an automatic transfer rule (weekly or triggered per-deposit) to move 25–30% of every dollar of revenue.
3. Never spend from the tax savings account except to pay quarterly federal and state taxes.
4. Reconcile the balance against your projected quarterly tax each month so you know whether you are over- or under-saving and can adjust the transfer percentage accordingly.

What Happens if You Underpay?

The IRS charges an underpayment penalty calculated as interest on the shortfall, prorated over the period you should have paid. The current rate is 8% APR (adjusted quarterly). The penalty is not a flat fee — it scales with the amount of underpayment and the time you went without paying.

To avoid the penalty entirely, hit the safe-harbor rule. If you fall short, the penalty is calculated automatically when you file your annual return — there is no notice or interaction needed. You can also use Form 2210 to calculate and document the penalty (or request a waiver in some cases).

Common Quarterly Tax Mistakes

• Not making any quarterly payments at all. The most common mistake among freelancers. Penalties compound quickly.
• Forgetting to set money aside. The quarterly deadline arrives and the cash has been spent on other things.
• Using last year’s number when income has grown significantly. Safe harbor protects from penalty but leaves a large April balance.
• Confusing federal and state deadlines. They are usually the same but always confirm.
• Not filing the annual return on time. Quarterly payments do not replace the annual return — you still file Form 1040 with Schedule C (or 1065/1120-S for entities) by April 15.
• Skipping Q4 because “I’ll just pay in April.” The penalty for Q4 underpayment is the highest of the four quarters because it accrues for the shortest time.
• Treating sales tax as income tax. They are separate — sales tax collected is the state’s money, not yours.

Quarterly Taxes for Different Business Structures

Sole proprietor or single-member LLC

Pay quarterly using Form 1040-ES. You pay both income tax and self-employment tax (15.3%) on net business profit.

Multi-member LLC or partnership

The LLC itself does not pay federal income tax. Each member pays quarterly estimated tax on their share of K-1 income, using Form 1040-ES.

S-corp shareholder

Shareholder-employees have W-2 payroll tax withheld on their salary. Quarterly estimated payments cover income tax on K-1 distributions plus any shortfall in withholding. The S-corp itself does not pay federal income tax.

C-corp

C-corps pay corporate quarterly estimated taxes on Form 1120-W. Shareholders separately pay personal quarterly estimated taxes if they receive significant dividends.

Tools to Help Calculate and Pay

• IRS Tax Withholding Estimator: Free official calculator that handles complex situations including multiple income sources.
• QuickBooks Self-Employed: Automatically estimates quarterly taxes based on income and expenses tracked in the app.
• Keeper Tax: Mobile app that tracks deductions and estimates quarterly taxes for freelancers.
• HoneyBook, Bonsai, FreshBooks: All have built-in tax estimation features for service businesses.
• Spreadsheet templates: A simple Google Sheet with monthly income, expenses, and a tax rate column does the job for most freelancers.

Recordkeeping for Quarterly Taxes

• Keep monthly profit and loss statements throughout the year
• Save confirmations of every quarterly payment (date, amount, method)
• Track withholding from any W-2 jobs alongside business income
• Reconcile your tax savings account monthly
• Save a copy of each Form 1040-ES voucher you mail in
• Update projections each quarter as actual income comes in

Track income and expenses with our free money and bookkeeping forms. The IRS quarterly-payments page at irs.gov/businesses/small-businesses-self-employed/estimated-taxes has the official forms and instructions, plus the latest Form 1040-ES voucher.

Adjusting Estimates Mid-Year

Income rarely matches projections perfectly. If your actual income deviates significantly from your initial estimate, adjust later quarterly payments accordingly. The IRS allows annualized income installments (Form 2210, Schedule AI) for businesses with uneven income — useful if most of your revenue comes in Q3 and Q4 rather than evenly throughout the year.

Working With an Accountant

For freelancers and very small businesses with simple finances, DIY quarterly estimates work perfectly well. Once revenue grows past $100,000–$150,000 or the business has multiple owners or S-corp election, the value of an accountant rises sharply. A typical small business CPA charges $500–$2,000 per year for quarterly tax planning plus annual filing — usually saving multiples of that fee in better estimates, missed deductions, and avoided penalties.

The 30% Rule of Thumb

For most self-employed people earning between $50,000 and $200,000 of net profit per year, setting aside 30% of every dollar of revenue is a reasonable default rule for combined federal income tax, self-employment tax, and state income tax. The actual rate may be slightly lower (closer to 25%) if you live in a no-income-tax state, slightly higher (closer to 35%) if you live in a high-tax state like California or New York. Refine the percentage in year two once you have actual results to compare against.

Quarterly Taxes vs Year-End Tax Filing

Quarterly estimated payments are pre-payments toward your eventual annual tax bill. They do not replace the annual return. You still file Form 1040 with the appropriate business schedules by April 15. The annual return reconciles what you actually owed against what you paid in quarterly estimates. If you overpaid, you get a refund. If you underpaid, you owe the balance plus any underpayment penalty.

What If Your Business Has a Loss?

If you reasonably expect a business loss this year and have no other significant income, you may not need to pay quarterly estimates. Recalculate at the start of each quarter — if income shifts, restart or adjust payments. Even with a current-year loss, the safe-harbor rule based on prior-year tax usually means a small quarterly payment is still required, unless prior-year tax was minimal too.

Frequently Asked Questions

What happens if I miss a quarterly tax deadline?

The IRS charges an underpayment penalty calculated as interest (around 8% APR) on the shortfall, prorated to when you should have paid. Pay as soon as possible — the penalty stops accruing once the payment is made.

Do I have to make all four payments?

If you hit safe harbor, technically yes — though the IRS rarely pursues penalties on a small Q4 underpayment if the first three quarters were paid in full. Best practice: pay all four to avoid any audit attention or penalty calculation.

Can I pay more than my estimated tax?

Yes. Overpaying creates a refund when you file your annual return (or you can elect to apply the credit to next year’s first quarterly payment). Some founders prefer to overpay slightly each quarter as a forced savings strategy and treat the eventual refund as a small windfall.

Next steps: organize your tax records with our bookkeeping and money forms, then review your full document checklist to keep tax filings, business licenses, and quarterly payments aligned.