Self-Employed Quarterly Tax Payment Calendar and Deadlines for 2025

By Yarik Yarosh, CPA ·September 5, 2026 ·7 min read

Written by Yarik Yarosh, CPA (US & Canada) September 5, 2026 · FL CPA license AC61704 · CPA Ontario

Self-employed individuals (sole proprietors, S-Corp owners on distributions, independent contractors, freelancers) have no employer withholding taxes from their pay. The IRS requires them to estimate their annual tax and pay it in four installments throughout the year. These are not optional prepayments; failure to make adequate estimated tax payments triggers an underpayment penalty under IRC 6654. The penalty is calculated at the federal short-term rate plus 3 percentage points (approximately 7-8% annualized in 2025), applied to each underpaid installment for the number of days it remains underpaid. There are three safe harbor methods to avoid the penalty: the prior-year safe harbor (pay 100% or 110% of last year’s tax), the current-year safe harbor (pay 90% of this year’s tax), and the annualized income installment method.

✓Key takeaway

2025 estimated tax payment calendar:

Payment	Period Covered	Due Date	Form 1040-ES
Q1	January 1 - March 31	April 15, 2025	Voucher 1
Q2	April 1 - May 31	June 16, 2025 (15th is Sunday)	Voucher 2
Q3	June 1 - August 31	September 15, 2025	Voucher 3
Q4	September 1 - December 31	January 15, 2026	Voucher 4

Note: the quarters are NOT equal. Q2 covers only 2 months (April-May), while Q3 covers 3 months (June-August). This is a quirk of the schedule, not a mistake.

Who must pay estimated taxes:

Sole proprietors (Schedule C filers)
S-Corp owners (on distributions, beyond W-2 withholding)
Partners in partnerships
Independent contractors (1099 workers)
Freelancers
Anyone expecting to owe $1,000+ in tax after withholding and credits

Three ways to avoid the underpayment penalty:

1. Prior-year safe harbor (IRC 6654(d)(1)(B)):

Pay 100% of prior year’s tax liability
If prior-year AGI exceeded $150,000 ($75,000 MFS): pay 110% instead
Split into 4 equal quarterly payments
No penalty even if current-year tax is much higher
Best for: growing businesses, Year 2 businesses (prior year had low/zero tax)

2. Current-year safe harbor:

Pay 90% of current year’s actual tax
Each quarter must meet or exceed the required amount
Penalty if any quarter underpays
Best for: stable businesses with predictable income

3. Annualized income installment (Form 2210 Schedule AI):

Each quarter’s payment based on actual year-to-date income
Best for: seasonal businesses (landscaping, snow removal, construction)
Requires filing Form 2210 Schedule AI with the return

Penalty rate (2025):

Federal short-term rate + 3% = approximately 7-8% annualized
Applied per quarter, per day of underpayment
Example: $5,000 underpayment for one quarter (90 days): $5,000 x 8% x 90/365 = $99

How do quarterly payments work step by step?

Hypothetical example

Round numbers. A self-employed plumber. Year 3. Single filer. Prior year (Year 2) tax liability: $22,000.

Step 1: Determine the safe harbor amount Prior-year AGI: $120,000 (under $150,000) Safe harbor: 100% of $22,000 = $22,000 Quarterly payment: $22,000 / 4 = $5,500

Step 2: Pay on time

Payment	Due Date	Amount	Method
Q1	April 15	$5,500	IRS Direct Pay or EFTPS
Q2	June 16	$5,500	IRS Direct Pay or EFTPS
Q3	September 15	$5,500	IRS Direct Pay or EFTPS
Q4	January 15	$5,500	IRS Direct Pay or EFTPS
Total		$22,000

Step 3: File return and settle up Year 3 actual tax: $25,000 Estimated payments made: $22,000 Balance due at filing (April 15): $3,000 Penalty: $0 (met the prior-year safe harbor)

Payment methods:

Method	Setup	Notes
IRS Direct Pay (pay.irs.gov)	No account needed	Instant, free, bank account
EFTPS (eftps.gov)	Enrollment required (5-7 days)	Schedule payments in advance
IRS2Go app	Download app	Mobile payments
Credit/debit card	Via approved processor	1.87-1.99% fee (credit), $2.50 (debit)
Check by mail	None	Mail with 1040-ES voucher

EFTPS is the best option for recurring payments because you can schedule all four payments at the beginning of the year.

The set-aside system: For a plumber earning approximately $200/day in net profit:

Daily set-aside: $200 x 25% = $50/day into a high-yield savings account
Monthly transfer: $50 x 22 working days = $1,100/month
Quarterly total: $3,300 (ready for the $5,500 payment with a small shortfall, covered by prior months’ accumulation)

With a 5% high-yield savings account:

Average balance: $5,000
Annual interest: $250
This interest partially offsets the quarterly payment obligation

What happens if you miss a payment:

Scenario	Penalty
Skip Q1 ($5,500), pay rest on time	~$165 penalty (9 months of underpayment on $5,500)
Skip Q1 and Q2 ($11,000), pay rest	~$440 penalty
Pay nothing all year, settle at filing	~$800-$1,000 penalty on $22,000 underpayment
Pay half ($2,750/quarter)	~$400-$500 penalty on the underpaid portion

The penalties are not catastrophic, but they’re completely avoidable. At 8% annualized, the penalty rate is higher than most savings account rates, making it a guaranteed losing proposition to hold the money in savings instead of paying the IRS.

S-Corp owner strategy (W-2 withholding): An S-Corp owner can increase their W-2 withholding instead of making estimated payments:

Salary: $60,000/year ($5,000/month)
Additional withholding: request $1,375/month extra on Form W-4
Annual extra withholding: $16,500
Combined with regular withholding ($9,000 FICA + estimated income tax): covers the full tax liability
Advantage: W-2 withholding is treated as paid evenly throughout the year (even if taken entirely in Q4)
This means an S-Corp owner can increase withholding in November/December and it’s treated as if paid quarterly. No penalty.

This is the “last resort” strategy for S-Corp owners who forgot to make estimated payments: increase December withholding to cover the entire annual shortfall. The IRS treats withholding as paid ratably, so there’s no underpayment penalty.

State estimated taxes: Most states with an income tax require estimated payments on the same or similar schedule. Some differences:

California: Q1 = 30%, Q2 = 40%, Q3 = 0%, Q4 = 30% (NOT equal quarters)
New York: equal quarters (same as federal)
Texas, Florida, etc.: no state income tax, no state estimated payments
Check your state’s specific schedule and safe harbor rules

Illustrative numbers only, not a real client and not advice for your facts.

What penalties apply for underpaying estimated taxes?

The IRS charges an underpayment penalty under IRC 6654 when you owe more than $1,000 at filing and your withholding and estimated payments are less than the required annual amount. The penalty is calculated separately for each quarter, so a large payment in Q4 doesn’t fully cure an underpayment from Q1 through Q3. You avoid the penalty entirely if your payments cover at least 90% of the current year’s tax or 100% of last year’s tax (110% if your AGI exceeded $150,000). The penalty rate is the federal short-term rate plus 3 percentage points, compounded daily. If your income varies significantly during the year, the annualized income installment method (Form 2210, Schedule AI) can reduce or eliminate the penalty by matching payments to when income was actually earned.

Should I use EFTPS or IRS Direct Pay for estimated tax payments?

Both are free and accepted by the IRS, but they work differently. EFTPS (Electronic Federal Tax Payment System) requires enrollment, which takes 5-7 business days for the verification PIN to arrive by mail. Once enrolled, you can schedule payments up to 365 days in advance, which is useful for automating quarterly payments. IRS Direct Pay requires no enrollment and processes same-day payments, but you cannot schedule future payments. For state estimated taxes, most states have their own online payment portals. Always save the confirmation number for every payment as proof in case of disputes.

Related guides:

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Cite this page

Yarik Yarosh, CPA. "Self-Employed Quarterly Tax Payment Calendar and Deadlines for 2025." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-self-employed-quarterly-tax-payment-calendar

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.