Leaving a PEO cleanly comes down to one question asked early and a sequence of tasks run in the right order. The early question is whether your PEO is a Certified Professional Employer Organization (CPEO): if it is, you can leave any month of the year without restarting federal payroll tax wage bases; if it isn’t, you should aim for a December 31 exit or accept that your company and your employees will pay Social Security and unemployment tax twice on wages already taxed this year. Everything else — notice, records extraction, tax and insurance registrations, 401(k) transition, ACA reporting, final payroll — flows from that timing decision.
Start by Checking Whether Your PEO Is Certified
Under a co-employment arrangement, your PEO files payroll taxes under its own Federal Employer Identification Number. When you leave, you begin filing under yours. Federal payroll taxes have annual per-employee caps: Social Security tax applies only to the first $184,500 of wages in 2026, and FUTA applies only to the first $7,000. Change the EIN mid-year and the IRS ordinarily treats it as a new employment relationship, resetting the wage base to zero for every employee. Your company then pays the 6.2% employer Social Security tax again on wages the PEO already paid it on, and employees see their share restart too.
Congress created a workaround. When a company leaves a CPEO, federal tax law treats the company as a “successor employer” and the CPEO as the “predecessor employer,” so each employee’s year-to-date wages carry over and no wage bases reset. The IRS publishes a searchable directory of every currently certified PEO; search “CPEO public listings” on irs.gov and confirm your provider is on it. If it isn’t, assume no successor-employer treatment applies.
Pick Your Exit Date
If your PEO is not certified, a December 31 exit is worth a lot of money. The wage bases reset naturally on January 1 anyway, so you avoid duplicate taxes entirely. If year-end isn’t possible, the next-best options are quarter-ends — March 31, June 30, or September 30 — because they line up with Form 941 quarterly filing periods and keep the reporting cleaner.
If your PEO is certified, you have flexibility on the calendar, but year-end still simplifies reporting because neither the PEO nor your company has to reconcile partial-year wage bases across two EINs.
Read the Client Service Agreement and Give Notice Correctly
Most Client Service Agreements require written termination notice 30 to 90 days before departure, and missing the window can auto-renew the contract for another full term. If your CSA auto-renews annually, you may need to give notice months before the renewal date even if your target exit is later. Pull the renewal and termination clauses now.
Expect tail fees or administrative charges covering final tax filings, data exports, and account reconciliation. Some CSAs cap them; others leave them open-ended. If you negotiated caps or specific fee terms when you signed, find those provisions before you send notice, because disputing vague charges after system access disappears is much harder.
Deliver the termination notice exactly as the CSA specifies. Certified mail with return receipt, or the PEO’s designated digital portal, creates the paper trail. Don’t rely on plain email unless the agreement explicitly permits it.
Pull Every Record Before Access Ends
Once you give notice, the clock starts on data extraction. PEOs typically cut system access on or shortly after the termination date, and recovering records afterward ranges from difficult to expensive. If your agreement allows parallel access, pull everything before sending the letter.
Personnel and Tax Records
Your new payroll provider needs a complete file for every active employee: full legal name, Social Security number, current address, date of birth, and hire date. You also need each employee’s current Form W-4 elections and Form I-9. The IRS requires W-4 retention, and federal regulations require I-9 retention for three years after the hire date or one year after employment ends, whichever is later.
Year-to-date payroll data is the single most important export. Your new system needs each employee’s cumulative wages, federal and state withholdings, Social Security and Medicare taxes paid, and any pre-tax benefit deductions for the current calendar year. This is also the data that lets a new provider honor successor-employer status if you’re leaving a CPEO.
Benefits, Leave, and Census
Export the full benefits enrollment history: medical, dental, and vision enrollments, dependents covered, and any supplemental elections like life or disability. Get a current list of anyone on COBRA continuation through the PEO’s plan, because you will assume administration for those individuals after the exit.
Migrate PTO and sick leave balances accurately. Any gap between what employees think they have banked and what the new system shows becomes a complaint at best and a wage claim at worst. Run a final PTO report as close to the transition as possible and reconcile it against what the new platform loads.
Pull a group health census while you’re in the system: date of birth, home zip code, employment status, salary, and dependent information for each employee. Carriers need this to quote, and having it ready lets you shop immediately rather than reconstructing it by hand.
Reactivate Your Own Tax and Insurance Accounts
Under the PEO, your own tax accounts may have gone dormant or never existed. Every account has to be live before your first independent payroll run.
Federal EIN
Confirm your EIN is active with the IRS. If you never had one because the PEO handled everything from day one, apply using Form SS-4; most businesses can obtain an EIN immediately online. If you had one pre-PEO, verify it’s still active and tied to the correct entity.
State Unemployment and Withholding
Every state where you have employees needs its own unemployment insurance account and income tax withholding registration. If those existed before, contact the state labor or revenue department to reactivate. If not, you register as a new employer, and new-employer registrations typically come with a default unemployment tax rate that may be higher than what the PEO paid under its pooled experience rating.
Under the PEO, your workers’ unemployment claims were pooled with the PEO’s entire client base. Some states allow a transfer of experience rating to your new standalone account; others assign the new-employer default rate. On a large payroll, the difference is real money each quarter. Contact your state’s unemployment office early to find out whether a transfer mechanism exists and what documentation it requires.
Workers’ Compensation
Your own workers’ compensation policy must be in force the moment the PEO’s master policy stops covering your employees. A single day without coverage can bring civil fines and, in some states, stop-work orders that halt operations until coverage is restored; extended lapses can trigger criminal penalties. Start shopping a standalone policy at least 60 days before your exit. Premiums depend on payroll size and industry classification, so have accurate payroll and headcount data ready to speed quoting.
Group Health Insurance
Line up a new carrier or broker early. Group health applications need the census data, and carriers typically need several weeks to underwrite and issue policies. Starting two to three months before the exit gives you time to compare plans, hold open enrollment, and have cards in hand before PEO coverage ends. Aim for a package at least comparable to what employees had under the PEO to avoid morale and retention problems.
Transition the 401(k) Plan
If employees participated in the PEO’s master 401(k), you need a plan for those assets. Setting up a standalone 401(k) typically takes 9 to 12 weeks, so start early. If no plan is in place when the PEO relationship ends, employees lose the ability to contribute and the company may face IRS and Department of Labor compliance issues.
Two paths move balances out of the PEO’s plan. A plan-to-plan transfer sends assets directly from the master plan into your new company plan. A distribution sends funds to participants, who then roll them into the new plan or into IRAs. The direct plan-to-plan transfer is cleaner because it avoids any risk of taxable events or missed rollover deadlines.
Expect a blackout period during the transition, when employees can’t change allocations, take loans, or request distributions from the old plan. Federal law requires the plan administrator to give participants written notice at least 30 days before the blackout begins, explaining why it’s happening, which investments and features are affected, the expected start date and duration, and a recommendation to review investment choices beforehand. If the PEO is the plan administrator, confirm in writing who is sending that notice and when.
Handle ACA Reporting if You’re an ALE
Companies with 50 or more full-time employees, including full-time equivalents, are Applicable Large Employers under the Affordable Care Act. If the PEO handled ACA compliance, that responsibility shifts entirely to your company after the exit. Penalties are assessed per employee and add up fast.
An ALE that fails to offer minimum essential coverage faces a penalty (originally $2,000, inflation-adjusted) multiplied by total full-time employees minus 30. An ALE whose coverage is unaffordable or fails minimum value standards faces a separate per-employee penalty (originally $3,000, also inflation-adjusted) for each full-time employee who instead enrolls in a subsidized marketplace plan. For 2026, the adjusted amounts are roughly $3,340 and $5,010.
After the exit you file Forms 1094-C and 1095-C with the IRS and furnish Form 1095-C to each full-time employee. In the transition year, coordinate with the PEO so that every month of the calendar year is accounted for across both entities’ filings. The IRS deadline is typically the end of February for paper filers and the end of March for electronic filers in the year following the coverage year.
Run the Final Payroll Without Overlap
Every dollar of wages and accrued vacation must land on the PEO’s last payroll run under its EIN. Anything missed will have to be paid by your company under your EIN on the new system, and that’s where duplicate wage reporting problems begin. Put the exact cutoff date in writing with the PEO. Overlapping payroll runs between the PEO and your new provider create reporting tangles that can take months to untangle with the IRS and Social Security Administration.
Before the first live payroll on the new system, verify that employee data migrated correctly. Check direct-deposit banking information, confirm withholding elections against each W-4, and run a parallel test cycle if the new provider offers one. A transposed routing number is a missed paycheck, and nothing erodes confidence in a transition faster than a pay error on day one.
Settle all pending PEO invoices and administrative fees before the account closes. Request a final statement of account showing every charge and credit, and file it with your transition records. Some PEOs hold a reserve against trailing claims or tax adjustments and don’t issue a final refund for 30 to 60 days after the exit.
After the Exit
Two W-2s for the Transition Year
For the year you leave, each employee receives two W-2s: one from the PEO for wages paid under its EIN and one from your company for wages paid under yours. Tell employees this before January so two forms in the mail don’t cause a call to HR. Both W-2s are filed with the Social Security Administration, and each employer is responsible for the accuracy of its own. Late or incorrect filings carry IRS penalties that scale from $60 per form for quick corrections up to $680 per form for intentional disregard.
COBRA
Your company takes over COBRA administration for any qualified beneficiaries who were on continuation coverage under the PEO’s health plan. Federal law imposes an excise tax of $100 per day per beneficiary during any period of noncompliance, capped at $200 per day when a qualifying event affects a family. The minimum tax after an IRS examination is $2,500 per beneficiary and rises to $15,000 if violations are more than minor. Many companies bring in a third-party COBRA administrator specifically because the penalty exposure makes self-administration risky.
Record Retention
You are responsible for records from both the PEO period and your standalone operations. IRS rules require employment tax records to be kept at least four years after the fourth-quarter return is filed for the year. The Fair Labor Standards Act requires payroll records for at least three years and supporting wage computation records for two. I-9s are kept three years from hire or one year after employment ends, whichever is later. Keeping everything for at least four years covers the longest of the audit windows.
Trailing Financial Items
Final invoices, credits, and refunds from the PEO may arrive a month or two after the exit. Some PEOs hold back reserves against trailing workers’ compensation claims or tax adjustments before releasing any remaining balance. Track each item and reconcile it against the final statement of account you received at termination. Once the last item clears, the co-employment relationship is fully closed.