Quarterly Estimated Tax Overview
Estimated taxes are pay-as-you-go tax payments on income that isn’t subject to withholding. If you’re self-employed, have investment income, or other non-withheld income, you likely need to make quarterly payments.
2026 Quarterly Tax Due Dates
| Quarter | Income Period | Due Date |
|---|---|---|
| Q1 | January 1 - March 31 | April 15, 2026 |
| Q2 | April 1 - May 31 | June 15, 2026 |
| Q3 | June 1 - August 31 | September 15, 2026 |
| Q4 | September 1 - December 31 | January 15, 2027 |
Note: If the due date falls on a weekend or holiday, the payment is due the next business day. All four 2026 dates fall on business days, so none of them shift.
Who Must Pay Quarterly Taxes?
Required If:
| Situation | Quarterly Payments Required |
|---|---|
| Self-employed/Freelancer | Yes (usually) |
| 1099 contractor | Yes (usually) |
| Rental income | Yes, if significant |
| Investment income (dividends/interest) | If significant |
| Capital gains | If significant |
| Pension/annuity without withholding | Yes |
| Side gig income | If $1,000+ owed |
The $1,000 Rule
You must make estimated payments if:
- You expect to owe $1,000 or more when filing, AND
- Your withholding and credits will be less than the smaller of:
- 90% of current year’s tax, OR
- 100% of last year’s tax (110% if AGI > $150k)
How to Calculate Quarterly Payments
Method 1: Current Year Estimate
Step 1: Estimate Annual Income
| Income Type | Amount |
|---|---|
| Self-employment income | $_____ |
| W-2 wages (if any) | $_____ |
| Investment income | $_____ |
| Other income | $_____ |
| Total Income | $_____ |
Step 2: Calculate Taxes
| Tax Type | Amount |
|---|---|
| Federal income tax | $_____ |
| Self-employment tax | $_____ |
| Total Tax | $_____ |
Step 3: Subtract Withholding
| Item | Amount |
|---|---|
| Total tax | $_____ |
| Less: W-2 withholding | ($___) |
| Less: Other withholding | ($___) |
| Tax Still Owed | $_____ |
Step 4: Divide by 4
Quarterly Payment = Tax Still Owed ÷ 4
Method 2: Safe Harbor (Easier)
Pay based on last year’s tax to guarantee no penalties:
| Your Situation | Safe Harbor Amount |
|---|---|
| Last year’s AGI ≤ $150,000 | 100% of last year’s tax |
| Last year’s AGI > $150,000 | 110% of last year’s tax |
Example:
- Last year’s tax: $20,000
- This year’s AGI expected: $200,000 (over $150k)
- Safe harbor: $20,000 × 110% = $22,000
- Quarterly payment: $22,000 ÷ 4 = $5,500
Quarterly Payment Examples
Freelancer, No W-2 Income
Uses the 2026 single-filer standard deduction ($16,100) and 2026 tax brackets.
| Factor | Amount |
|---|---|
| Annual self-employment income | $80,000 |
| Business expenses | ($15,000) |
| Net self-employment income | $65,000 |
| Self-employment tax (92.35% × 15.3%) | $9,184 |
| Adjusted gross income (after half-SE-tax deduction) | $60,408 |
| Standard deduction (2026, single) | ($16,100) |
| Taxable income | $44,308 |
| Federal income tax (2026 brackets) | $5,069 |
| Total Federal Tax | $14,253 |
| Quarterly Payment | $3,563 |
This simplified example excludes the QBI deduction, which would further reduce taxable income for most freelancers — see the QBI deduction guide.
Side Gig + Full-Time Job
| Factor | Amount |
|---|---|
| W-2 salary | $75,000 |
| W-2 withholding | $10,500 |
| Side gig income | $20,000 |
| Side gig expenses | ($3,000) |
| Net side gig | $17,000 |
| SE tax on side gig | $2,402 |
| Additional income tax (illustrative, at marginal rate) | ~$3,500-$4,100 |
| Additional tax owed (illustrative) | ~$5,900-$6,500 |
| W-2 withholding | ($10,500) |
| Tax after withholding | Varies — may still owe |
| Quarterly Payment (illustrative) | ~$1,000-$1,600 |
Actual additional income tax depends on your marginal bracket and other deductions — use a full calculator or tax software for precision.
Investment Income
| Factor | Amount |
|---|---|
| W-2 salary | $100,000 |
| W-2 withholding | $15,000 |
| Dividend income | $15,000 |
| Capital gains | $25,000 |
| Additional tax on investments (illustrative) | ~$5,000-$9,000 |
| Withholding covers | ($15,000) |
| Additional tax due (illustrative) | ~$2,000-$4,000 |
| Quarterly Payment (illustrative) | ~$500-$1,000 |
Actual tax on investment income depends on whether gains are short-term or long-term and your overall tax bracket.
Underpayment Penalty Calculator
Penalty Rate
The underpayment penalty rate is the federal short-term rate plus 3 percentage points — 7% annually for individuals as of Q3 2026 (resets quarterly; check irs.gov/payments/quarterly-interest-rates for the current rate).
Penalty Calculation
| Factor | Amount |
|---|---|
| Required payment | $5,000 |
| Actual payment | $3,000 |
| Underpayment | $2,000 |
| Days late | 90 |
| Penalty (at 7% annualized) | ~$35 |
Formula: Underpayment × Rate × (Days Late ÷ 365)
Avoiding Penalties
| Safe Harbor Option | How It Works |
|---|---|
| Pay 100% of last year’s tax | Divide by 4, pay quarterly |
| Pay 90% of this year’s tax | Estimate accurately |
| AGI > $150k: Pay 110% of last year | Higher bar for high earners |
Annualized Income Method
If your income is uneven throughout the year, you can use the annualized income method to pay based on actual income each quarter:
| Quarter | Annualization Factor | Calculate Quarterly Payment |
|---|---|---|
| Q1 | 4 (3 months × 4) | Based on Jan-Mar income |
| Q2 | 2.4 (5 months × 2.4) | Based on Jan-May income |
| Q3 | 1.5 (8 months × 1.5) | Based on Jan-Aug income |
| Q4 | 1 (12 months × 1) | Based on Jan-Dec income |
Best for: Seasonal businesses, commission-based income, real estate agents, etc.
How to Make Quarterly Payments
Payment Methods
| Method | How to Access |
|---|---|
| IRS Direct Pay | irs.gov/payments (free, bank transfer) |
| EFTPS | eftps.gov (free, schedule in advance) |
| Debit/Credit Card | irs.gov/payments (fees apply) |
| Check by Mail | Form 1040-ES voucher |
Record Keeping
Track each payment:
- Date paid
- Amount paid
- Confirmation number
- Quarter applied to
State Quarterly Taxes
Most states with income tax also require quarterly estimated payments:
| State Tax Status | Action Needed |
|---|---|
| No income tax (9 states) | No state quarterlies |
| State has income tax | Usually quarterly payments required |
| State due dates | Often same as federal, but verify |
States with no income tax: AK, FL, NV, NH*, SD, TN, TX, WA, WY (*NH taxes dividends and interest only)
Adjusting Quarterly Payments
When to Adjust
| Situation | Action |
|---|---|
| Income higher than expected | Increase Q3/Q4 payments |
| Income lower than expected | Decrease future payments |
| Major life change | Recalculate entire year |
| Unexpected large expense | Account for deduction |
How to Catch Up
If you underpaid early:
- Increase remaining quarterly payments
- No need to “make up” specific quarters
- Annual total matters most
Key Takeaways
-
Pay quarterly if you’ll owe $1,000+ — Avoids underpayment penalties
-
Safe harbor is the easiest approach — 100% of last year’s tax (110% if high income)
-
Don’t forget self-employment tax — 15.3% on top of income tax
-
Use IRS Direct Pay or EFTPS — Free methods to submit payments
-
Track everything — Keep records of all payments and confirmation numbers
-
Adjust throughout the year — Increase or decrease based on actual income
Quarterly payments cover both income tax and self-employment tax liability — see estimated tax due dates for the four 2026 deadlines (April 15, June 15, September 15, January 15). Paying too little triggers an underpayment penalty calculated on the shortfall; that article explains the safe-harbor rules that let you avoid a penalty even if your estimate is off. For the full picture of how freelancers manage taxes throughout the year, see the freelancer tax guide.
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