Every payroll team knows the January scramble. The year closes, W-2s have to go out, and suddenly you're chasing down address changes, untangling a third-party sick pay statement that showed up late, and wondering why someone's taxable wages don't match what you expected. Employees start calling the day forms hit their mailbox, and every correction at that point means a W-2c and a fresh round of headaches.
It doesn't have to go that way. Almost everything that blows up in January can be caught in the fall, when you have time to fix it calmly. A clean W-2 is the product of a clean fourth quarter, not a heroic last week. The work is mostly verification and reconciliation, and ADP Workforce Now gives you the tools to do it before year-end pressure sets in.
This is your pre-year-end cleanup checklist. Run it now, while there's room to breathe. Work through it in order, fix what you find at the source, and January turns into a non-event. A note up front: this is general guidance to help you organize the work. Tax treatment of specific items varies, so confirm anything unusual with your tax advisor or ADP representative.
Start with identity, because a mismatch here can get a W-2 rejected by the Social Security Administration no matter how perfect the numbers are. Pull a roster from ADP Workforce Now and check that every active and terminated employee who was paid this year has a name and Social Security number that match their Social Security card exactly. Nicknames, missing hyphens, and transposed digits all cause rejections.
Addresses matter too, especially for anyone who moved during the year or works remotely across state lines. A wrong address means a returned form and an employee who never gets their W-2. Send a reminder asking people to confirm their information in self-service before the cutoff. It's far cheaper to fix an address in October than to reissue a form in February.
Pay special attention to terminated employees. They're easy to forget because they're no longer on your day-to-day radar, but anyone you paid this year gets a W-2, and they're the most likely to have a stale address since they moved on and didn't update you. Pull a full-year roster, not just your active list, and make sure every former employee who earned wages has a deliverable address on file. A returned form from someone who no longer works there is one of the most common January headaches, and it's entirely preventable in the fall.
This is the core of W-2 prep, and it's where the real surprises live. Your goal is to tie the year-to-date taxable wages in ADP Workforce Now back to your payroll registers and your general ledger, box by box. Federal taxable wages, Social Security wages, Medicare wages, and state wages each follow their own rules, so they won't all match each other, and that's expected.
What you're looking for is anything that doesn't reconcile. A pretax deduction that should have reduced federal taxable wages but didn't. A benefit that should have been taxed but wasn't. Run a quarter-by-quarter check rather than waiting for one year-end number, so a problem in Q1 doesn't hide inside the annual total. Reconciling now, while you can still process an adjustment in a live payroll, is the whole point. After year-end, the same fix becomes a correction.
Employer-provided group-term life insurance above a certain coverage amount creates taxable income for the employee, often called imputed income. The cost of that excess coverage has to be calculated, added to taxable wages, and reported on the W-2, including in the appropriate informational box. The dollar threshold and the cost table are set by the IRS and can change, so confirm the current figures with your advisor.
The common mistake is forgetting this entirely until year-end, then trying to add a year's worth of imputed income into the final payroll, which can spike an employee's tax withholding in a single check. If you've been carrying this through the year, verify it's calculated correctly. If you haven't, address it now so the catch-up is manageable rather than jarring.
If a disability insurer or other third party paid sick or disability benefits to your employees this year, those payments often have W-2 reporting consequences, and the responsibility for reporting can depend on your arrangement with the provider. The statements from the third party tend to arrive late, sometimes after you'd like to have closed the books.
Reach out to your provider now and ask when their year-end statement will arrive and what it will contain. Get the reporting responsibility nailed down in writing so there's no January surprise about who reports what. If the amounts need to land on your W-2s, make sure they're entered in ADP Workforce Now before your final processing, not bolted on after. This single item causes more year-end W-2 corrections than almost anything else.
Retirement plan participation and contributions show up on the W-2 in specific ways, including a checkbox indicating the employee was an active participant and codes that report elective deferrals. Errors here are easy to make and easy to miss. The retirement plan box gets left unchecked for participants, or checked for people who weren't in the plan. Deferral codes get applied to the wrong contribution type.
Verify that everyone who contributed has the correct code and that the participant indicator matches your plan records. Also confirm that total deferrals for any highly compensated or older employees were tracked against the annual limits, since limits change yearly and an over-contribution is its own cleanup project. Confirm current limit figures with your advisor rather than assuming last year's numbers carried forward.
Walk through your deduction codes and confirm each one is taxed the way it should be. Pretax items like certain health premiums, retirement deferrals, and qualifying benefits should be reducing the right taxable wage bases. Post-tax deductions shouldn't be reducing anything. A single deduction code set up with the wrong tax treatment, replicated across hundreds of paychecks all year, produces a wages figure that's quietly wrong on every affected W-2.
This is tedious and worth every minute. Pull the deduction setup, list what each code is supposed to do, and confirm the actual tax behavior matches. Pay extra attention to any code that was added or changed during the year, since a mid-year setup error often slips through the cracks that an established code wouldn't. Also watch for codes that affect state taxable wages differently than federal, because a treatment that's correct federally can still be wrong for a particular state. Catch a misconfigured code in the fall and you fix one setting and run an adjustment. Catch it in February and you're reissuing forms.
ADP Workforce Now lets you generate a preview of W-2 data before the real forms go out. Use it. A preview turns the abstract reconciliation work above into something concrete: forms you can actually inspect. Spot-check a sample across different employee types, your salaried staff, your hourly workers, anyone with imputed income or third-party sick pay, and anyone who terminated mid-year.
Look for blank boxes that shouldn't be blank, wages that don't match your reconciliation, and codes that look off. Run available audit reports to flag negative wages, missing SSNs, and out-of-balance conditions. This preview is your last clean checkpoint before forms become official. Treating it as a real review, not a rubber stamp, is what separates a quiet January from a noisy one.
A client called us in October, a mid-sized employer that had been doing W-2s the same way for years and always ended up with a stack of corrections in February. They weren't doing anything obviously wrong. They just weren't checking until it was too late to fix anything cleanly.
We ran the checklist with them. The SSN verification turned up about a dozen mismatches, mostly from a busy hiring season where cards weren't checked carefully. The deduction review found one health-related code set up with the wrong tax treatment, which had been quietly understating a wage base on a few hundred paychecks all year. And their third-party sick pay statement, which always arrived late and always caused a scramble, got pinned down with a phone call that confirmed the amounts and the reporting split.
None of these were dramatic on their own. Together they were the entire February correction pile, surfaced in October when each fix was a single calm adjustment. They processed an adjustment payroll before year-end, the previews came back clean, and W-2s went out without a single correction. Your situation will have its own items; the point is that fall is when they're cheap to fix.
Quarterly reconciliation is exactly the right habit, and it makes year-end far easier. But year-end has items that don't show up in a normal quarter: imputed income for group-term life, third-party sick pay, retirement coding, and the W-2 preview itself. The year-end pass is shorter when you've reconciled all year, but it's not the same work.
Call the provider now and ask two questions: when the statement arrives, and who's responsible for reporting it. Getting the answer in writing before year-end means you can plan around the timing instead of reacting to it. If the amounts belong on your W-2s, you'll know to hold a slot in your final processing for them.
Every January fix that's already on a furnished form becomes a W-2c, which means reissuing to the employee, refiling with the agencies, and fielding questions from a confused worker. Multiply that by however many forms share the same root cause and the cost adds up fast in time and credibility. Fall fixes are single adjustments. January fixes are corrections with a paper trail.
What Good Looks Like
A clean W-2 season is built, not hoped for. The teams that sail through January are the ones who verified identities in the fall, reconciled taxable wages quarter by quarter, handled imputed income and third-party sick pay before final processing, and treated the W-2 preview as a real audit. Their final payroll of the year is unremarkable because the surprises were already found and fixed.
Build this checklist into your annual calendar with a start date in early fall and a hard internal deadline well before forms are due. Do that and the January scramble becomes someone else's problem, not yours. Your people get accurate W-2s on time, and you get your January back.
Work With Specialists Who've Done This Before
We're former ADP service professionals who work with ADP exclusively. We've run this checklist inside ADP Workforce Now for clients of every size, and we know where the year-end surprises hide. When you call, you get a dedicated consultant who's done this exact cleanup before. No tickets, no hold queues, just a real person who answers.
Want a clean W-2 season instead of a January scramble? Let's run your checklist now. Request a consultation.
ADP and the ADP logo are registered trademarks of ADP, Inc. This content is general guidance only and not tax or compliance advice. Reporting rules, thresholds, and contribution limits change; confirm current figures and your specific treatment with your licensed advisor or ADP representative.
