To file LLC quarterly taxes, you estimate what you will owe in federal income tax and self-employment tax for the year, split that total across four IRS payment periods, and send each installment by its due date using Form 1040-ES vouchers or an electronic payment method. The requirement kicks in once you expect to owe at least $1,000 after withholding and credits, which covers most LLC owners because pass-through profits reach you without any tax taken out along the way.1Internal Revenue Service. Estimated Taxes
Whether You Need to Pay Quarterly at All
If you expect to owe less than $1,000 for 2026 after subtracting withholding and refundable credits, you can skip estimated payments entirely. Above that threshold, quarterly payments are required.
The rules below apply to LLCs taxed as pass-through entities: single-member LLCs on Schedule C, multi-member LLCs filing Form 1065 with K-1s to each member, and LLCs that elected S-corp status (where distributions above your reasonable salary flow through untaxed at the source). If your LLC elected C-corp treatment, the corporation itself pays tax, the trigger drops to $500 of expected liability, and the calculation runs on Form 2220 rather than the individual forms discussed here.
Quarterly Deadlines for 2026
The IRS divides the year into four uneven periods. For 2026:
- Q1 (January 1 – March 31): due April 15, 2026
- Q2 (April 1 – May 31): due June 15, 2026
- Q3 (June 1 – August 31): due September 15, 2026
- Q4 (September 1 – December 31): due January 15, 2027
The Q2 window covers only two months, which is where owners most often fall behind. None of the 2026 dates fall on a weekend or federal holiday, so no automatic extensions apply this year.2Internal Revenue Service. When Are Quarterly Estimated Tax Payments Due? When a deadline does fall on a Saturday, Sunday, or legal holiday in the District of Columbia, it shifts to the next business day.3Internal Revenue Service. Publication 509 (2026), Tax Calendars A payment is timely if it is postmarked or transmitted electronically by the due date.
One shortcut for the last installment: if you file your full 2026 return and pay any remaining tax by January 31, 2027, you can skip the January 15 payment.
How to Calculate Each Payment
Form 1040-ES contains the worksheet the IRS expects you to use, along with the payment vouchers.4Internal Revenue Service. About Form 1040-ES, Estimated Tax for Individuals The steps run in this order.
Project Your Adjusted Gross Income
Start with expected gross income from all sources, including your share of LLC profits. Subtract ordinary business expenses (supplies, rent, professional fees, and the rest) and any above-the-line deductions you qualify for. Your prior-year return is the cleanest starting point.
Add Self-Employment Tax
Self-employment tax covers both halves of Social Security and Medicare, so you pay the full 15.3%. For 2026, the 12.4% Social Security portion applies to the first $184,500 of net self-employment earnings.5Social Security Administration. Contribution and Benefit Base The 2.9% Medicare portion has no ceiling.6Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) An extra 0.9% Additional Medicare Tax applies to self-employment income above $200,000 for single filers, $250,000 for married filing jointly, or $125,000 for married filing separately.7Internal Revenue Service. Topic No. 560, Additional Medicare Tax
Deduct half of your self-employment tax as an above-the-line adjustment.8Office of the Law Revision Counsel. 26 USC 164 – Taxes The deduction does not reduce the self-employment tax itself, but it lowers AGI and therefore income tax. Skip this step and you will overpay every quarter.
Apply Deductions, Brackets, and Credits
Subtract the standard deduction or your itemized deductions. For 2026, the standard deduction is $16,100 for single filers and $32,200 for joint filers.9Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments from the One, Big, Beautiful Bill Run the 2026 brackets against your taxable income (rates run from 10% on the first $12,400 single up to 37% above $640,600 single), then subtract credits such as the Child Tax Credit.
Add income tax to self-employment tax. That total is your estimated tax for 2026. Divide by four for the standard quarterly amount.
The Qualified Business Income Deduction
Most pass-through LLC owners can also claim the 20% qualified business income deduction under Section 199A, made permanent by the One, Big, Beautiful Bill Act. It reduces income tax but not self-employment tax. The calculation is straightforward when 2026 taxable income is below $201,750 (single) or $403,500 (joint). Above those levels the deduction phases down based on whether the business is a specified service trade, the W-2 wages it pays, and its depreciable property, with a phase-in range of $75,000 for most filers and $150,000 for joint filers. Inside the phase-in, tax software or a professional pays for itself.
When Income Is Uneven
Dividing by four assumes steady income. Seasonal or unpredictable businesses can use the annualized income installment method, which recalculates each quarter’s required payment based on income actually earned through that period. At filing time you show your work on Schedule AI of Form 2210. The method is legitimate but demands clean records period by period.
Safe Harbor Targets That Prevent a Penalty
You avoid an underpayment penalty if your combined payments and withholding meet either of these thresholds:
- At least 90% of the total tax on your 2026 return, or
- At least 100% of the total tax on your 2025 return (assuming it covered 12 months).
If your 2025 AGI exceeded $150,000 ($75,000 if married filing separately), the prior-year target rises to 110% of last year’s tax.10Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax The prior-year test is popular with LLC owners because it gives you a fixed number to hit regardless of how the current year shakes out; just remember the 110% bump if last year was strong.
How to Send the Payment
Four methods are available. Electronic options confirm instantly and leave a clean audit trail.
- Electronic Federal Tax Payment System (EFTPS). Free IRS portal that lets you schedule payments up to 365 days ahead. Registration requires a mailed PIN, so set it up well before the first deadline you plan to use it for.11Internal Revenue Service. EFTPS: The Electronic Federal Tax Payment System
- IRS Direct Pay. Debits your bank account with no registration; you verify identity from a prior-year return. Payments can be scheduled and modified or canceled up to two business days before the scheduled date.12Internal Revenue Service. Direct Pay with Bank Account
- Credit or debit card through third-party processors, each charging its own fee.
- Mail. Detach a 1040-ES voucher and send it with a check or money order to the address for your region in the form instructions. No cash.
Save confirmation numbers or cleared checks for every quarter. You will need them to reconcile your account on the annual return, and they resolve any dispute with the IRS the fastest.
What Underpayment Costs
When quarterly payments miss the safe harbor, the IRS charges a penalty that works like interest on the shortfall. It accrues separately for each quarter that fell short, running from that quarter’s due date until you pay or until April 15 of the following year, whichever comes first.10Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax
The rate is the federal short-term rate plus three points, reset each quarter. For the first quarter of 2026, that rate is 7%.13Internal Revenue Service. Quarterly Interest Rates A $5,000 underpayment carried six months runs roughly $175. Small on its own, but it stacks across quarters and years for anyone who chronically underestimates.
The IRS may waive the penalty in limited situations: retirement after age 62 or disability during the tax year or the year before, where the shortfall had reasonable cause, or where a casualty, disaster, or unusual circumstance makes the penalty inequitable. Request the waiver on Form 2210.14Internal Revenue Service. Instructions for Form 2210 For federally declared disasters, the IRS generally waives penalties automatically.
State Quarterly Payments
Federal payments cover only the IRS side. Most states with an income tax require their own quarterly estimates from self-employed individuals and LLC owners, usually on the same calendar as the federal deadlines but with different thresholds (as low as $100 in some states) and their own safe harbor percentages. A few states have no income tax or no quarterly requirement. If your LLC earns income in more than one state, expect to owe estimated payments in each. Check your state department of revenue’s site early in the year so a state penalty does not land on top of a federal one.
Records to Keep
Estimated payments are projections, and projections invite scrutiny when the annual return does not line up. Keep the following on hand:
- Income records: invoices, deposit records, 1099s, and any documentation of gross receipts.
- Expense records: receipts, canceled checks, and card statements identifying payee, amount, date, and purpose.
- Payment confirmations: EFTPS confirmation numbers, Direct Pay receipts, or cleared-check images for each quarterly installment.
The IRS recommends tracking gross income, deductions, and credits in a single accounting system, whether software or a ledger.15Internal Revenue Service. What Kind of Records Should I Keep Updating monthly keeps each quarter’s calculation close to what you will actually owe on the annual return.