What are quarterly taxes and who needs to pay them?

Quarterly taxes are estimated tax payments you make four times a year on income that doesn’t have automatic withholding, such as freelance earnings, business profits, or investment income. Instead of paying your entire tax bill at year-end, the IRS requires you to pay as you earn throughout the year.

If you’re a freelance designer or small business owner earning steady income, nothing may be withheld from your payments, which can lead to a large tax bill at filing time. Quarterly tax payments help you stay compliant with the pay-as-you-go system, avoid penalties, and maintain predictable cash flow.

What are quarterly taxes?

Quarterly taxes, also called estimated taxes, are payments you make to the IRS four times per year to cover income tax and self-employment taxes on income that isn’t subject to withholding. You calculate and submit these payments using Form 1040-ES.

The U.S. tax system operates on a pay-as-you-go basis, meaning you must pay taxes as income is earned rather than waiting until you file your annual return. Employees meet this requirement through payroll withholding, but independent earners must estimate and submit payments themselves to avoid penalties.

How do quarterly taxes differ from annual taxes?

Quarterly taxes are advance payments toward your total annual tax bill. You still file a regular tax return each year to reconcile your actual liability. If you overpay, you receive a refund; if you underpay, you owe the remaining balance.

Common misconceptions about quarterly taxes include:

• You only pay them if you run a business: Many taxpayers assume quarterly taxes apply only to business owners, but they also affect investors, gig workers, landlords, and retirees with significant non-withheld income
• They’re optional: Quarterly payments are required if you meet IRS thresholds, and failing to pay can trigger penalties even if you eventually pay your full tax bill
• You pay the same amount each quarter automatically: Many taxpayers divide payments evenly, but the IRS allows variable payments using annualized income methods when earnings fluctuate

How quarterly taxes work

Quarterly taxes apply to income without automatic withholding, such as freelance payments, rental income, dividends, or capital gains. Because no employer deducts taxes on this income, you must estimate your liability and submit payments yourself. These payments typically cover both federal income tax and, if applicable, self-employment tax.

The IRS divides the year into four payment periods:

• Q1: January through March
• Q2: April through May
• Q3: June through August
• Q4: September through December

Each period has a specific due date that doesn’t align perfectly with calendar quarters.

To avoid underpayment penalties, you generally must pay at least 90% of your current year’s total tax liability or 100% of your prior year’s tax liability. If your adjusted gross income exceeded $150,000 in the prior year, the threshold increases to 110% of your prior year’s tax. Meeting one of these safe harbor thresholds protects you from penalties even if your income increases.

Who needs to pay quarterly taxes?

You generally must make quarterly payments if you expect to owe at least $1,000 in federal taxes after subtracting withholding and credits. This applies if you won’t have enough tax withheld throughout the year to meet the 90% current-year standard or a safe harbor threshold based on your prior year’s return.

This requirement commonly affects:

• Self-employed individuals and freelancers
• Small business owners and partners
• Independent contractors and gig workers
• Investors earning dividends or capital gains
• Landlords collecting rental income

If you anticipate owing $1,000 or more at filing time after accounting for withholding and credits, estimated payments are typically required. Special situations include retirees with significant investment income, individuals receiving large bonuses without sufficient withholding, and taxpayers with irregular income streams.

Corporations generally must make estimated payments if they expect to owe at least $500 in tax for the year. Corporate estimated taxes follow different calculation rules, but the pay-as-you-go principle still applies.

Self-employed and freelancers

Self-employed individuals must pay both income tax and self-employment tax, which totals 15.3% and covers Social Security and Medicare contributions. Unlike employees, freelancers pay both the employer and employee portions. Quarterly payments help spread this obligation throughout the year.

Freelance professionals affected include designers, writers, consultants, rideshare drivers, online sellers, and independent healthcare providers. Anyone receiving 1099 income without withholding typically falls into this category. Managing quarterly taxes is essential for maintaining financial stability.

Business owners and investors

Business owners such as sole proprietors, LLC members, and S-corp shareholders often pay estimated taxes on pass-through income because profits flow directly to their personal returns. Since withholding doesn’t apply to most distributions, quarterly payments help prevent large year-end liabilities.

Investors with significant dividends, capital gains, or interest income may also need to make estimated payments, especially during strong market years. Planning ahead reduces the risk of unexpected penalties.

2025 quarterly tax due dates

The IRS sets four estimated tax deadlines each year. For 2025 income, the federal quarterly tax due dates are:

Quarterly tax periods aren’t equal calendar quarters. The second period covers only two months, which often surprises first-time payers.

Payment period breakdown

• Q1 covers income earned from January 1 through March 31 and is due April 15, 2025. This payment reflects income from the first three months of the year.
• Q2 spans April 1 through May 31 and is due June 16, 2025. Because this period covers only two months, it requires careful tracking if your income fluctuates.
• Q3 runs from June 1 through August 31, with payment due September 15, 2025. Seasonal businesses often see mid-year revenue spikes during this period.
• Q4 covers September 1 through December 31 and is due January 15, 2026. This final installment helps reconcile your total estimated liability before filing season begins.

How to calculate your quarterly tax payments

You can calculate estimated taxes using either last year’s tax liability or your projected income for the current year. The right method depends on how stable your income is and how much certainty you want around avoiding penalties.

Prior year safe harbor method

This method bases your payments on your previous year’s tax liability. To meet safe harbor requirements, you must generally pay 100% of last year’s total tax, or 110% if your adjusted gross income exceeded $150,000.

Steps:

1. Locate last year’s total tax on Form 1040
2. Multiply that amount by 100% (or 110% if required)
3. Divide the result by four to determine each quarterly payment

Example:If last year’s total tax was $12,000, you would divide $12,000 by four and pay $3,000 each quarter.

Current year estimation method

This method estimates payments based on your expected income, deductions, and credits for the current year. Taxpayers typically use the Form 1040-ES worksheet to guide these calculations.

Steps:

1. Estimate your total annual income
2. Subtract projected deductions and credits
3. Calculate your expected total tax liability, including self-employment tax if applicable
4. Divide the total by four to determine each quarterly payment

Example:

A freelancer expects to earn $80,000 for the year.

$80,000 * 15.3% (self-employment tax) = $12,240

• Estimated income tax: $7,000
• Total estimated tax: $19,240
• Quarterly payment: $4,810

If your income fluctuates significantly during the year, you may use the annualized income installment method to adjust payments based on what you actually earn each period.

How to pay quarterly taxes

You can pay quarterly taxes online, by card, or by mail. Most taxpayers choose electronic payment methods for speed and confirmation, but traditional options remain available.

Online payment options

Traditional payment methods

You can mail a check or money order with Form 1040-ES payment vouchers. This method works well for taxpayers who prefer paper records.

Pros:

• Simple and familiar process
• Physical payment documentation
• No electronic setup required

Cons:

• Slower processing time
• Risk of mailing delays
• No instant confirmation

When mailing payments, include the correct voucher, write your Social Security number on the check, and send it to the appropriate IRS address listed in the Form 1040-ES instructions.

Penalties for missing quarterly tax payments

​​If you don’t pay enough tax throughout the year, the IRS may assess an underpayment penalty. The penalty is calculated on the amount you underpaid for each quarter and is based on the federal short-term interest rate plus 3%, adjusted quarterly.

Penalties typically apply if you underpay estimated taxes, miss payment deadlines, or fail to meet safe harbor thresholds. In general, you must pay at least 90% of your current year’s total tax liability or meet the 100% or 110% prior-year safe harbor rule to avoid penalties.

Exceptions include:

• You owed less than $1,000 after withholding and credits
• You paid at least 90% of your current-year tax
• You met safe harbor requirements based on your prior year’s return
• You experienced a qualifying disaster, casualty, or other hardship

How to avoid penalties

The simplest way to avoid penalties is to meet a safe harbor threshold. Paying 100% of last year’s total tax, or 110% if your prior-year income exceeded $150,000, generally protects you even if your income increases.

If your income fluctuates during the year, the annualized income installment method allows you to adjust payments based on actual earnings each period. This approach is useful for seasonal businesses or irregular income streams.

Farmers and fishermen follow special rules that allow them to make fewer estimated payments under certain conditions. These exceptions are designed for industries with highly seasonal income patterns.

State quarterly tax requirements

In addition to federal estimated taxes, many states require quarterly payments if you expect to owe income tax. State rules often mirror federal requirements, but thresholds, forms, and due dates can differ.

Some states follow the same $1,000 threshold used by the IRS, while others set lower or higher limits. Safe harbor rules may also vary, and not all states use the same 90% or prior-year standards. A few states, including those without personal income tax, do not require estimated income tax payments at all.

To determine your obligations, review your state tax agency’s website and estimated tax forms. If your business operates in multiple states or earns income across state lines, you may have separate filing and payment requirements. Understanding how state-level taxes apply to your revenue, including topics such as sales tax on SaaS, can help prevent unexpected liabilities.

Tips for managing quarterly taxes

Managing quarterly taxes requires consistent tracking and proactive planning. Building structured financial habits reduces stress and helps you avoid underpayment penalties.

Set aside money regularly

Setting aside money throughout the year ensures you have funds available when payments are due. Many experts recommend reserving 25% to 30% of your income for taxes to prevent cash flow surprises.

Use separate business bank accounts

Using separate business bank accounts simplifies record-keeping and makes it easier to track taxable income and deductible expenses. Clear separation reduces reporting errors and improves visibility into available cash after reserving tax funds.

Many business owners automate transfers by moving a percentage of each payment into a dedicated tax savings account. This habit reduces the risk of spending money that should be reserved for quarterly payments.

Work with tax professionals

Working with tax professionals provides guidance on deductions, credits, and compliance strategies. Advisors can monitor safe harbor thresholds and adjust your estimated payments as your income changes.

If your earnings fluctuate seasonally, a tax professional can help you apply annualized income calculations correctly. Expert support reduces compliance risk and saves time.

Strategize quarterly tax plans

Quarterly tax planning strategies include:

• Tracking income monthly: Regular monitoring helps you spot earnings trends early and adjust estimates before a deadline
• Using automated savings transfers: Scheduled transfers build tax reserves without relying on manual discipline
• Adjusting estimates after major income changes: Updating calculations after new contracts, bonuses, or unexpected expenses keeps payments aligned with actual earnings

Use accounting tools and resources

Accounting software such as QuickBooks, Xero, and FreshBooks helps track income and estimate taxes. These tools generate reports and simplify forecasting.

The IRS provides Form 1040-ES worksheets, online calculators, and payment portals at irs.gov. Professional advisors can also assist with complex income scenarios, including multi-state obligations and investment income.

Automate quarterly tax payments and avoid penalties with Ramp

Quarterly taxes require accurate tracking, timely estimates, and consistent payments. Missing a deadline or underestimating income can lead to penalties and disrupt cash flow, especially if your books aren’t up to date.

Ramp’s accounting automation software helps keep your financial records accurate throughout the year by automatically managing accruals and expense categorization. Here’s how Ramp supports your quarterly tax process:

• Automatic accrual posting: Ramp posts accruals when receipts or invoices are missing, helping ensure expenses land in the correct period so your quarterly tax estimates reflect actual obligations
• Accrual reversals: When documentation is added, Ramp reverses accruals and posts final transactions, keeping your books clean and your estimates precise
• Real-time expense tracking: Transactions are coded and categorized as they post, giving you a current view of deductible expenses before each payment deadline

With accurate financial data available at any time, you can calculate and submit quarterly tax payments with greater confidence. Try a demo to see how Ramp automates the accounting work that keeps your tax payments on track.

The information provided in this article does not constitute accounting, legal, or financial advice and is for general informational purposes only. Please contact an accountant, attorney, or financial advisor to obtain advice with respect to your business.