I picked up the second remote role last March, both W-2, roughly $94k and $61k, US. I never touched the W-4 on either one and it turns out each payroll withheld as if it was the only income I had, so April was a surprise I had to put on a card. I'm not asking anyone to do my return, I want to know what people actually changed on the second job's paperwork so this stops happening.
Two payrolls, two withholding calculations, and neither of them knows the other exists. That is the entire bug. The fix lives on the W-4, not in April — either the multiple-jobs section or a flat extra dollar amount per paycheck on the smaller job.
I did the flat amount route because it is easier to reason about: I picked a number, watched two paychecks, adjusted once, done. Been within a couple hundred dollars either way for three years.
Same, and the flat extra amount is the one thing I'd tell anyone starting a second job on day one. Set it slightly high on purpose for the first year. Getting a small refund back is annoying but it is not a card balance in April.
That framing helps — I was treating it as one tax problem instead of two payrolls that can't see each other. Adjusting the smaller one makes sense because the salary there is easier to absorb.
I did it wrong first and it cost me more than the tax. Year one I owed about $3,100, paid it late, and got hit with an underpayment penalty on top. Year two I still hadn't fixed the W-4 and just made one estimated payment in January thinking that patched it — it doesn't, because the penalty is calculated by quarter.
Paid a preparer $260 to look at it once. She set my withholding, explained the quarterly thing in ten minutes, and I've owed under $400 every year since. Cheapest money I've spent.
Slight pushback on the answer above about just checking the multiple-jobs box on both forms. That works when the two incomes are near each other. Mine are $118k and $22k, and doing it that way over-withheld me by something like $2,800 across the year — I gave the government an interest-free loan for twelve months.
If your jobs are lopsided, use the estimator or the flat extra amount instead. The checkbox is designed around roughly-equal pay and nobody says that out loud.
Fix it at the source, not at filing. A preparer costs less than the penalty and far less than the interest on a card. Do it before your next pay run, not in March.
One thing nobody mentions: if the two employers are in different states and you're remote for both, you may have a nonresident return to file as well as the withholding problem. I found that out the second year.
That one is genuinely worth paying somebody for. The withholding you can fix yourself; the multi-state part I would not guess at.
@spreadsheet_tabs · 7d ago · 3 replies
I run the IRS withholding estimator twice a year, mid July and again early November, with the year-to-date figures off both paystubs. Takes about fifteen minutes if you have the stubs open.
First year I did that I was projected $1,900 short in July, added $190 a paycheck to the second job for the rest of the year, and landed $130 under at filing. November is the useful one because you still have five or six paychecks to correct with.
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@margin_notes_mo · last wk.
Worth doing it right after any bonus lands too. A single lumpy payment is what threw my projection out both years I got one.
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@layoverlurker · 4d ago
The November run is the one that matters and almost nobody does it. In July you can still be wrong by a lot and fix it gently; in November you know the year's shape and you have five paychecks of runway to correct with.
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