The April 15th tax deadline has come and gone. If you filed on time, your 2025 taxes are officially in the rearview mirror. But now that we’re well into 2026, it’s time to think ahead and make sure you don’t face any unwelcome surprises when you file your 2027 return next spring.

One of the biggest struggles I see among retirees is figuring out how to properly withhold taxes from their various income sources. Unlike your working years when withholding happened automatically through your paycheck, retirement income comes from multiple streams. Each one has different withholding rules and options.

If you don’t have a financial planner helping you navigate this, or if you’re handling it yourself, you need to understand how retirement withholding works. That’s where the IRS Withholding Estimator comes in.

In this guide, I’ll walk you through how to use this free IRS tool to calculate your tax liability and determine where and how much to withhold from your retirement income sources.

What Is the IRS Withholding Estimator?

The IRS Withholding Estimator is a free online calculator that helps you estimate your federal income tax liability for the current year. It tells you how much you should be withholding from various income sources to avoid underpayment penalties.

This is an estimate. The IRS is not liable if you enter incorrect information or if the tool produces inaccurate results. You’re still responsible for paying the correct amount of taxes. But when used properly, this tool gives you a solid understanding of what you’ll owe and which income sources you should withhold from.

Why Retirees Need to Pay Special Attention to Withholding

During your working years, your employer withheld taxes from every paycheck. You didn’t have to think about it much beyond filling out a W-4 form when you started your job.

Retirement is different. You might be receiving income from:

Social Security benefits
Pension payments
IRA or 401(k) distributions
Investment income (interest and dividends)
Capital gains from selling investments

Each of these income sources has different tax treatment and different withholding options. If you don’t withhold enough throughout the year, you could face underpayment penalties when you file your return. If you withhold too much, you’re essentially giving the IRS an interest-free loan.

Two Ways to Avoid Underpayment Penalties

Before we dive into the tool itself, you should know that you have two main options for paying your taxes throughout the year:

Option 1: Withholding from retirement income sources You can have taxes withheld directly from your Social Security, pension, and IRA distributions. This is usually the simpler approach for retirees.

Option 2: Quarterly estimated tax payments You can make four estimated tax payments throughout the year (due in April, June, September, and January). This works well if you have income that doesn’t allow for withholding, like rental income or capital gains.

Most retirees find withholding easier because it happens automatically. You don’t have to remember to write checks four times a year. That’s the approach we’ll focus on in this guide.

A Sample Couple: Setting Up Our Example

To show you exactly how the IRS Withholding Estimator works, let’s walk through a real example. I’m going to use our tax planning software first to calculate what this couple should owe, then we’ll replicate those numbers using the IRS tool.

Here’s our sample couple:

Both spouses are over age 65
Married filing jointly
No earned income from work (both fully retired)

Their 2026 income sources:

Taxable interest: $2,500
Qualified dividends: $1,000
Ordinary dividends: $2,000
IRA distributions: $50,000
Pension income: $12,000 ($1,000/month)
Gross Social Security: $40,000 ($3,333.33/month)
No capital gains

Total income: $101,500

Now, you might be wondering about that Social Security number. If you’re familiar with how Social Security taxation works, you know that up to 85% of your benefit can be included in taxable income based on your provisional income.

In this couple’s case, 85% of their Social Security benefit will be taxable. The lower your other income, the less of your Social Security gets taxed. But with $50,000 in IRA distributions plus other income, this couple hits the 85% threshold.

What Our Tax Planning Software Shows

Let me show you what this couple’s tax situation looks like when I run it through our professional tax planning software.

Starting with their adjusted gross income of $101,500, we apply the 2026 standard deduction. Because both spouses are over 65, they get the enhanced standard deduction plus the additional senior deduction.

Deductions:

Standard deduction for married filing jointly: $35,500
Additional senior deduction: $12,000 ($6,000 per spouse)
Total deductions: $47,500

Taxable income: $54,000

This puts them squarely in the 12% tax bracket with a total federal tax liability of $5,864. Their effective tax rate works out to just under 11%.

That’s our target number: $5,864. Now let’s see if we can replicate this using the free IRS Withholding Estimator.

Step-by-Step: Using the IRS Withholding Estimator

You can find the IRS Withholding Estimator at irs.gov. I’ll include a direct link in the resources section at the end of this post.

Step 1: Enter Your Filing Status and Basic Information

The first section asks for basic information about you and your spouse.

For our example couple:

Age: Both are 65 years or older
Not blind
Not dependents on anyone else’s return
Not claiming any dependents
Filing status: Married filing jointly
Spouse is also age 65 or older

This section is straightforward. Just make sure you select the correct filing status and indicate if you or your spouse are over 65, as this affects your standard deduction.

Step 2: Enter Income and Withholding Information

This is where things get more detailed. The tool asks about different types of income and any taxes you’ve already had withheld.

For this walkthrough, I’m not going to show any withholding yet. We want to first see what the total tax liability is, then we can decide where to withhold from.

W-2 Income

Our couple has no W-2 income since they’re both fully retired. We’ll skip this section.

Pension Income

Our couple receives $1,000 per month from a pension.

Here’s where you need to pay attention to how the questions are asked. The tool wants to know:

How often you’re paid (monthly, in this case)
Your most recent payment amount ($1,000)
Total amount received so far this year

Since we’re running this example in April, they’ve received four monthly payments totaling $4,000 year to date.

If your pension pays quarterly or annually, make sure you select the right payment frequency. The tool calculates based on how you’re actually paid.

For now, we’re entering zero for federal tax withholding. We’ll come back to this.

Social Security Income

Our couple receives $40,000 annually in Social Security, which works out to $3,333.33 per month.

Again, the tool asks when the benefits started. If you began collecting Social Security mid-year, you need to enter the start date. Our couple has been receiving benefits all year, from January 1 to December 31.

One important thing to note: Social Security gives you five withholding options. You cannot pick a random percentage. Your choices are:

0% (no withholding)
7%
10%
12%
22%

These are your only options for federal tax withholding from Social Security. For now, we’re leaving this at zero.

Pre-Tax Retirement Account Income

Here’s where we run into a quirk with the IRS tool.

The estimator has a field for “pre-tax retirement account income.” This is where you’d enter IRA distributions, 401(k) withdrawals, or any other traditional retirement account distributions.

Our couple is taking $50,000 in IRA distributions this year. Every dollar of this is taxable as ordinary income since it’s coming from a traditional IRA.

Watch out for the bug in the system: When you enter this amount in the “pre-tax retirement account income” field, the tool doesn’t calculate provisional income correctly for Social Security taxation purposes. The final numbers come out wrong.

You can a) verify this for yourself by running through this, or b) checking out the video in which I run through this step by step.

I’m not entirely sure why this happens, but I’ve found a reliable workaround. Instead of entering your IRA distributions in the pre-tax retirement account field, enter them in the “other taxable income” field further down the page.

For now, let’s enter the $50,000 in the pre-tax retirement account field and see what happens.

Investment Income

Our couple also has investment income:

Interest income: $2,500
Ordinary dividends: $2,000
Qualified dividends: $1,000

You cannot withhold taxes from interest or dividend income paid by your brokerage. These are paid directly to you with no withholding option. But you still need to report them so the tool can calculate your total tax liability.

Other Taxable Income

We’ll skip this for now, but remember this field. This is where we’ll move the IRA distribution amount to fix the calculation bug.

Step 3: Adjustments to Income

The next screen asks about various adjustments to income, such as:

Student loan interest deduction
Educator expense deduction
Deductible IRA contributions
Health Savings Account contributions
Self-employed health insurance

Our retired couple doesn’t have any of these, so we’ll skip this section entirely. If you’re still making deductible IRA contributions or have other adjustments, this is where you’d enter them.

Step 4: Deductions

The tool asks whether you’ll take the standard deduction or itemize.

For 2026, the standard deduction for married filing jointly is $35,500. Our couple is taking the standard deduction.

The next question asks about additional deductions. This is important for retirees.

Under current tax law, there are a few deductions you can take even if you use the standard deduction:

Charitable contributions (up to certain limits)
Additional senior deduction for taxpayers over 65
Car loan interest deduction for qualifying borrowers

Our couple qualifies for the additional senior deduction. Both spouses are over 65, so they each get an additional $6,000 deduction, for a total of $12,000.

Make sure you check the box indicating that both you and your spouse (if applicable) are taking advantage of this senior deduction. This is a significant tax benefit you don’t want to overlook.

Step 5: The Results

Now we see:

Taxable income: $54,000
Total tax: $5,867

This is within a few dollars of what our tax planning software calculated ($5,864). The small difference is just rounding.

This is the correct calculation. Our couple owes $5,864 in federal taxes for 2026.

I must stress however, as of the publishing of this post, had you entered the correct IRA withdrawal in section 2, you would have gotten a $0 federal tax owed, which is incorrect.

Deciding Where to Withhold

Now that we know the tax liability, we need to decide where to withhold from.

Our couple has three income sources that allow for tax withholding:

Social Security ($40,000/year)
Pension ($12,000/year)
IRA distributions ($50,000/year)

You cannot withhold from interest income or dividend income. Those are paid directly to you with no withholding option.

So which source should you use for withholding?

You have several options:

Option 1: Withhold from one source You could have all $5,864 withheld from your IRA distributions. That’s about 11.7% withholding.

Option 2: Withhold from multiple sources You could withhold 10% from Social Security ($4,000), plus a small amount from your IRA to cover the remaining $1,864.

Option 3: Spread it evenly You could withhold smaller percentages from all three sources.

There’s no right or wrong answer. It’s really about what feels most comfortable to you and what’s easiest to manage.

Many retirees prefer to have withholding come from their IRA distributions because:

The amounts are usually larger
You can specify any percentage you want (not limited to set options)
It’s easy to adjust if your situation changes

Social Security withholding can work well too, but remember you’re limited to those five percentage options (0%, 7%, 10%, 12%, 22%). In this example, 10% from Social Security would be $4,000, which covers most of the tax bill.

Making Changes Throughout the Year

Here’s an important point: your income might not stay exactly the same all year.

Maybe you need to take an extra $20,000 from your IRA for a home repair. Or perhaps you sell some investments and realize capital gains. Maybe you inherit money or receive a one-time distribution.

Any of these events will change your tax liability. That’s why it’s smart to:

Run the estimator in January or early in the year
Set your withholding based on that estimate
Check again mid-year if anything changes
Adjust your withholding if needed

The IRS Withholding Estimator is a planning tool, not a one-and-done calculation. Your tax situation can change, and you need to adjust accordingly.

Avoiding Quarterly Estimated Payments

One of the benefits of withholding from your retirement income is that you can avoid making quarterly estimated tax payments.

If you don’t withhold enough (or at all) from your retirement income, you may need to make estimated tax payments four times a year:

April 15
June 15
September 15
January 15 of the following year

This means remembering to write checks or make online payments four separate times. Miss a payment or pay too little, and you could face underpayment penalties.

For most retirees, it’s much simpler to set up automatic withholding from one or more income sources and let it happen throughout the year without thinking about it.

Safe Harbor Rules to Avoid Penalties

The IRS has “safe harbor” rules that protect you from underpayment penalties. You’re generally safe from penalties if you pay either:

At least 90% of your current year’s tax liability, OR
100% of your prior year’s total tax (110% if your adjusted gross income was over $150,000)

So if you paid $6,000 in federal taxes for 2025, you can withhold $6,000 for 2026 and avoid penalties even if your actual 2026 tax liability turns out to be higher.

This is helpful if your income varies from year to year. You can use the prior year safe harbor to avoid penalties, then settle up any difference when you file your return.

But it’s still better to get close to your actual liability so you don’t face a big tax bill (or give the IRS an interest-free loan by overpaying).

Double-Check Your Numbers

One final piece of advice: verify your results.

I showed you how I ran the same scenario through two different systems (our professional tax software and the IRS estimator) and confirmed they produced nearly identical results.

You should do something similar. If you:

Work with a CPA or tax professional, have them verify your numbers
Use tax preparation software to run an additional projection
Have a financial planner? Ask them to review your withholding strategy

Getting a second opinion helps ensure you’re withholding the right amount and won’t face surprises at tax time.

Key Takeaways

Using the IRS Withholding Estimator isn’t complicated, but it does require attention to detail. Here’s what to remember:

The tool is free and helpful. It gives you a solid estimate of your federal tax liability and helps you plan your withholding strategy.

Watch out for the IRA distribution bug. If your numbers don’t look right, try entering IRA distributions in the “other taxable income” field instead of the pre-tax retirement account field.

You have multiple withholding options. You can withhold from Social Security, pensions, IRA distributions, or a combination. Choose what works best for you.

Social Security withholding has limits. You can only choose from five set percentages: 0%, 7%, 10%, 12%, or 22%.

Check your work. Verify your calculations using tax software or with a professional to make sure you’re on track.

Review and adjust. Your income might change during the year. Check your withholding mid-year and adjust if needed.

Safe harbor rules protect you. Paying at least 100% of last year’s tax or 90% of this year’s tax helps you avoid penalties.

Need Help With Your Retirement Tax Planning?

Figuring out withholding is just one piece of retirement tax planning. You also need to think about:

Roth conversion strategies
Social Security taxation
Required minimum distributions
Medicare IRMAA surcharges
State tax implications
Multi-year tax planning

If you’re feeling overwhelmed or want to make sure you’re optimizing your retirement tax situation, we can help.

At Hyperion Financial, we work specifically with pre-retirees and retirees to develop comprehensive tax strategies that minimize your lifetime tax burden. We use professional tax planning software to model different scenarios and help you make informed decisions about withholding, conversions, distributions, and more.

If you’d like to discuss your specific situation and see how we might be able to help, schedule a complimentary consultation with our team. We’ll review your income sources, current withholding, and overall tax situation to help you avoid surprises and keep more of your hard-earned retirement savings.