How to Set Your Tax Withholding (and Stop Overpaying)

A giant tax refund feels great, but it means you overpaid all year and gave the government an interest-free loan. The goal of good withholding is to owe or get back close to nothing, keeping your money in your own paycheck instead.

What withholding is

Withholding is the tax your employer takes out of each paycheck and sends to the IRS on your behalf. At tax time, you reconcile: if you withheld more than you owed, you get a refund; less, and you owe. The amount is controlled by the W-4 form you file with your employer.

Why a big refund is not a win

The average refund runs into the thousands of dollars. That is money you could have had in each paycheck during the year, to spend, save, or pay down debt. A refund is not free money from the government, it is your own money being returned without interest.

How the modern W-4 works

The current W-4 no longer uses "allowances." Instead you account for multiple jobs, a working spouse, dependents, and other income or deductions directly. The more accurately you fill it out, the closer your withholding lands to your actual tax.

When to revisit it

Update your W-4 after any major change: marriage or divorce, a new baby, a second job, a big raise, or a spouse starting or stopping work. These events shift your tax picture and stale withholding is the usual cause of a surprise bill or an oversized refund.

Don't under-withhold either

Aiming for zero is good, but withholding too little can trigger an underpayment penalty. The safe-harbor rules generally protect you if you pay at least 90% of this year's tax or 100% (110% for higher earners) of last year's. Side income without withholding is the most common reason people fall short.

Dial in the right number with our withholding estimator.