What happens if I miss a quarterly tax payment?

The IRS charges an underpayment penalty — currently calculated at the federal short-term interest rate plus 3%. It's not a massive amount but it adds up, and it's completely avoidable by making the four payments on time.

Do I have to pay state estimated taxes too?

In most states, yes. State estimated tax rules mirror the federal system but the thresholds and due dates vary. Check your state's department of revenue website for the specific rules — most states follow the same quarterly schedule.

Can I pay more than required to avoid any surprise at filing?

Yes, and many business owners do. Overpaying results in a refund when you file your annual return. Some owners prefer to slightly overpay each quarter and treat the refund as a forced savings buffer.

How do I know how much I'll owe for the year?

If it's your first year in business, estimate based on your projected net profit. Multiply net profit by your expected effective tax rate (roughly 25–30% for most self-employed individuals when you include self-employment tax). A tax professional can give you a more precise estimate.

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Financial Systems·5 min read

Quarterly estimated taxes for small businesses

How self-employed individuals and small business owners pay taxes during the year — and how to avoid underpayment penalties.

Direct answer

If you expect to owe $1,000 or more in federal taxes for the year, the IRS requires you to pay estimated taxes quarterly — in April, June, September, and January. Missing or underpaying these installments results in an underpayment penalty. The simplest approach is to pay 100% of last year's tax bill across four equal payments.

Simple explanation

Employees have taxes withheld from every paycheck. Self-employed people don't — so the IRS requires them to estimate and pre-pay taxes four times a year. Most first-year business owners don't know this and get hit with a penalty when they file their annual return.

How to handle quarterly estimated taxes

1
Understand who needs to pay
If you expect to owe $1,000 or more in federal income tax for the year (after credits and withholding), you're required to pay quarterly. This includes self-employed individuals, freelancers, sole proprietors, and business owners who take distributions.
2
Know the four due dates
Q1 (Jan–Mar): April 15. Q2 (Apr–May): June 15. Q3 (Jun–Aug): September 15. Q4 (Sep–Dec): January 15 of the following year. Mark these on your calendar and set reminders.
3
Calculate a safe payment amount
The safest method: pay 100% of last year's total tax bill in equal quarterly installments (110% if last year's adjusted gross income exceeded $150,000). This is the 'safe harbor' rule — if you hit it, no penalty applies even if you end up owing more.
4
Pay directly at IRS.gov
Use IRS Direct Pay (free) or the Electronic Federal Tax Payment System (EFTPS) to make payments online. Keep your confirmation numbers.
5
Set aside money monthly
A practical rule: set aside 25–30% of every payment you receive into a separate savings account labeled 'taxes.' This removes the quarterly payment from your operating cash flow and prevents surprise shortfalls.

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Quarterly estimated taxes for small businesses

Simple explanation

How to handle quarterly estimated taxes

Understand who needs to pay

Know the four due dates

Calculate a safe payment amount

Pay directly at IRS.gov

Set aside money monthly

Summary

Frequently asked questions

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