How do I handle taxes when I get a bonus or commission payment?

Are you getting these as a separate check, or is it rolling into your regular paycheck?

The key thing is your employer should be withholding taxes on bonus/commission money just like regular wages - federal income tax, Social Security, Medicare, the whole deal. So if it's showing up on your paycheck stub with deductions already taken out, you're mostly covered. Your withholding might be a bit off though, especially with bigger bonuses, so come tax time you could owe more or get a refund depending on your overall income and situation.

If you're self-employed or getting these as a lump sum payment that doesn't have withholding, that's when you need to be proactive. You'll want to set aside maybe 25-30% or so for federal and state taxes, plus self-employment tax if applicable. Keep track of exactly what you earned and when, because you'll need those numbers for your tax return. Some people make quarterly estimated tax payments to avoid a huge bill at the end of the year - whether you need to do that depends on how much you're bringing in overall.

Either way, just don't assume the money is all yours to spend. Talk to a tax person or use tax software that can walk you through your specific situation - bonuses can bump you into a different bracket or mess with credits you were counting on, so it's worth double-checking rather than guessing.

Does your company give you the option to choose withholding method for bonuses, or do they just apply a flat rate? The previous answer nails it - your employer should be withholding automatically - but worth noting that some places use a "supplemental wage" withholding approach where they take a straight percentage (often 22% or even higher) rather than calculating based on your total annual income, which might mean you're overtaxed or undertaxed depending on your bracket. If you suspect the withholding's off, you can always adjust your W-4 during the year or just reconcile it when you file your return.

One thing that catches people off guard is that bonuses sometimes get hit with a higher withholding rate than your regular salary, since employers often use the "aggregate method" and treat that lump sum as if you earn it every pay period. So you might end up over-withheld, which means a refund later, but it's worth double-checking your pay stub to make sure the withholding actually makes sense for your total income picture.

The real issue is whether you're tracking what actually gets withheld versus what you'll actually owe when you file.

Most employers do withhold something on bonuses, sure, but as mentioned elsewhere in this thread, they often use a flat rate or the aggregate method, which can leave you either way overwithheld or underbitted depending on your full year income. If a bonus pushes you into a higher tax bracket, the withholding might not be enough. That's why you need to run the numbers yourself come tax time - don't just assume what came out of your paycheck is correct.

I'd suggest using a tax calculator (the IRS site has tools, or honestly any tax software will do this) where you plug in your total income for the year from all sources, and see what you actually owe. Compare that to what was withheld across all your paychecks and bonuses combined. If you're consistently getting big refunds or owing money at the end of the year, you can adjust your W-4 during the year so less or more gets withheld going forward. It takes maybe twenty minutes but saves a lot of stress in April.