My cousin called me in late March a few years ago, stressed out. She'd changed jobs in October, and the W-2 from her old employer had never arrived. She'd called them twice, gotten voicemails both times, and now the tax deadline was three weeks away and she had no idea what to do.
The answer turned out to be something I'd never heard of: Form 4852. It's an IRS form that lets you file your taxes without a W-2, using your last pay stub and some estimates. It's not well-publicized, and most people don't know it exists until they need it. Here's how it works, when to use it, and when not to.
What Form 4852 is
Form 4852 is called "Substitute for Form W-2, Wage and Tax Statement, or Form 1099-R." The IRS created it specifically for situations where an employer doesn't issue a W-2 — because they went out of business, because they're delayed, because they refuse, or because something else has gone wrong.
You attach Form 4852 to your regular tax return in place of the missing W-2. On the form, you report your estimated wages and tax withholding, based on the best information you have (usually your last pay stub), along with an explanation of why you're using 4852 instead of a real W-2.
The IRS receives the 4852, processes your return, and later reconciles against your employer's records once they eventually show up. If your estimates match, you're done. If they don't match, the IRS contacts you and you'll file an amended return.
When to use Form 4852
Form 4852 exists for legitimate situations. The IRS is pretty clear that you should only file it when you can't get a real W-2, not when you just don't want to wait.
Legitimate scenarios include:
Your employer went out of business. Bankruptcies, dissolutions, and company failures can result in the employer never issuing W-2s. Form 4852 is how you file anyway.
Your employer refuses to issue a W-2. Yes, this happens. Some employers (especially small or unscrupulous ones) decline to issue W-2s, usually to hide payroll practices they shouldn't be engaging in. The IRS treats this as the employer's failure, not yours.
Your W-2 is late and you've made reasonable attempts to get it. If you've contacted the employer, waited a reasonable time, and still don't have a W-2 by late February, you're allowed to file 4852. The IRS recommends trying to get the W-2 first — contacting the employer, contacting the IRS to request their help, and then using 4852 as a last resort.
Your W-2 arrived with errors that your employer won't correct. If your employer issued a W-2 but the numbers are wrong and they refuse to issue a corrected W-2c, you can use 4852 to report what you believe are the correct numbers.
You should not use 4852 because you're impatient, or because the W-2 is mildly inconvenient to find. The IRS expects you to try to get the real document first.
The IRS process before you use 4852
The IRS recommends a specific sequence.
First, contact your employer. Ask for the W-2 in writing. Give them a reasonable deadline. For a legitimately delayed W-2, most employers will respond and send it.
Second, contact the IRS if you still don't have the W-2 by late February. The IRS has a formal process where they'll contact the employer on your behalf. Call 1-800-829-1040 (or check current IRS guidance for the right number). They'll ask for your employer's name, address, and EIN if you have it, and your own identifying information. They'll reach out to the employer and try to resolve the issue.
Third, if the tax deadline is approaching and you still don't have a W-2, file with Form 4852 attached to your regular return. By this point, you've documented your attempts to get the real document, which is important if the IRS later has questions.
How to fill out Form 4852
The form itself is straightforward, but a few fields trip people up.
Line 5: wages, tips, and other compensation. Use the YTD gross wages from your final pay stub (the last one you received from this employer). This is your Box 1 equivalent — but remember, Box 1 excludes pre-tax deductions, so if your pay stub doesn't already show "taxable wages" as a separate line, you'll need to calculate it (gross YTD minus pre-tax deductions like 401(k), health insurance, HSA, etc.).
Line 7: federal income tax withheld. YTD federal tax withholding from your last stub.
Line 8-10: Social Security and Medicare wages and taxes. Usually your full YTD gross (with some adjustments) for the wage fields, and the YTD Social Security and Medicare tax withholding for the tax fields. Social Security wages cap out at the annual wage base, so if you earned above the cap, the wage field tops out there.
Line 9 and 11: state tax information. If applicable, from your pay stub.
How you calculated your estimates. The form asks you to explain your methodology. Something like "Final pay stub dated December 15, 2025" is sufficient. Be honest about your source.
Why you're filing 4852 instead of W-2. You need to describe what happened — "Former employer Company X has not issued W-2; contacted three times in January and February with no response" is the level of detail they want.
Why your last pay stub is the right source
The YTD columns on your final pay stub of the year are, in theory, what your W-2 was built from. If payroll processes your final period correctly, the YTD numbers should match the W-2 exactly.
In practice, there's sometimes a small gap — a year-end adjustment, a correction, a late bonus — but for most people, the final stub is accurate to within a few dollars. That's good enough for Form 4852.
If you have all 26 pay stubs for the year (assuming biweekly), you can also build the numbers from scratch by summing the individual periods. For most situations, the YTD column is the more reliable approach because it comes from payroll's internal totals rather than your manual math.
Getting your pay stub data into a spreadsheet makes this kind of calculation much easier. Having 26 rows of gross, federal tax, and deductions laid out cleanly lets you sum columns and spot any anomalies. That's what I built StubSheet for (disclosure: I'm the creator), but you can also do it manually if you have time and focus.
Risks and caveats
Form 4852 isn't without risks. Here's what to know.
Your estimates might not match. When your employer eventually files their payroll records with the IRS (which happens even if they didn't send you a W-2), the IRS will compare. If your 4852 estimates don't match their records, the IRS will send you a notice and you may need to file an amended return.
Refund delays. The IRS often delays refunds on returns with Form 4852 attached, because they want to verify the numbers before issuing the refund. If you're expecting a quick refund, expect it to take longer when you use 4852.
Accuracy penalties. If your estimates are substantially wrong — and especially if they're wrong in your favor — the IRS can assess penalties. Make a good-faith effort to get the numbers right. Use your pay stubs, not guesses.
Form 4852 is an attestation. By signing it, you're stating under penalty of perjury that your numbers are accurate to the best of your knowledge. Don't treat it casually.
The short version
Form 4852 lets you file your taxes without a W-2 when you genuinely can't get one from your employer. Use your last pay stub of the year as the source, report the YTD wages and withholdings on the form, explain why you're using 4852, and attach it to your regular return. Contact the employer first, then the IRS, then file 4852 as a last resort. Expect potential delays on your refund and keep accurate records in case the IRS asks questions later.
If your W-2 is just late, wait a little longer. If it's actually missing and the deadline is close, 4852 is a legitimate tool and not nearly as scary as most people assume.