Company Savings & Paycheck Impact

If you're evaluating a pretax wellness program, you likely want to:

• Confirm that no one on your team takes home less after enrolling

• Know your true cost, including admin fees and who pays them

• Turn a savings quote into per-payroll numbers you can plug into cash flow

Most vendors will hand you a compelling number, like $600 per employee or a six-figure annual total. That's a reasonable place to start, because it tells you whether the program is worth a closer look.

From our experience working with hundreds of employer groups, though, a single savings figure doesn't answer the question your staff will ask the day you announce the program: "What happens to my check?"

The only way to truly know is to model every participant's paycheck, before and after, at your actual pay frequency. For that to work, the model has to be built from your real payroll file and show its work line by line. Most illustrations don't.

That's where Thrive Benefits Group stands apart. With Thrive:

• Every participant gets a before-and-after paystub model, built from your payroll file, at your pay frequency, employee by employee.

• Admin fees are shown on the stub, not buried in a total. You see exactly what the employer pays, what the employee pays, and what each side keeps.

• Edge cases are flagged before enrollment, not discovered on the first payroll.

• A mock payroll runs before go-live, so you see real stubs before anyone's real check runs.

• Your staff gets answers for tax time, lenders, and Social Security before they have to ask.

In this guide, we walk through how to read a savings quote, where the fees land, and how to confirm every paycheck before your first live payroll.

Thrive Benefits Group designs and administers pretax wellness programs for small and mid-size employers and nonprofits. Request a zero-commitment savings preview built from your own payroll data.

In this Post

Why Every Paycheck Should Be Modeled, Not Averaged

An average is useful for your P&L. It's useless to the employee who falls below it.

When an employee enrolls, a few lines on their paystub change and a few don't:

The tax side is simple math. Qualified benefits elected through a written cafeteria plan are excluded from wages for income tax, Social Security, and Medicare purposes. Every dollar that's pretaxed stops being taxed, so the savings equal the pretax amount multiplied by the employee's combined tax rate. We walk through that math line by line in our FICA mechanics post.

The net pay side is where a single example stops being useful. Filing status, dependents, wages, state of residence, and existing pretax deductions like health premiums all move the result. Two employees with the same salary can land in different places.

That's why we don't publish a "typical" paystub and ask you to assume your team looks like it. We build a before-and-after stub for every participant, from your payroll file, at your pay frequency.

Want to see it for your own team? Request a zero-commitment savings preview, and we'll model every participant's paycheck before you decide anything.

Who Pays the Admin Fee in a Pretax Wellness Program?

"What does this cost us, and how does the fee split?" is usually the first question an owner asks, and it's a fair one. Here's the split per participant, per month:

Employer: the fee is paid from your FICA savings, and you net about $50 per participant per month.

Employee: the fee is paid from their tax savings, and net pay is modeled per person.

The employer side is the same for every participant, because employer FICA is a flat rate: 6.2% for Social Security and 1.45% for Medicare. The employee side depends on each person's tax situation, which is why it's modeled individually.

Your quote shows an annual, per-participant figure of about $600, already net of the employer fee.

The employer fee is paid from the FICA savings the program creates, so your net stays positive from the first payroll. The employee fee is paid from the employee's tax savings, not from their existing take-home pay.

Fees are the same for every group. Fixed fees mean every employee at every client is modeled on identical terms, so no one has to wonder whether their quote depended on who negotiated it.

How to Read a Savings Quote: Monthly, Annual, or Per Payroll

Most confusion about savings figures comes down to units. The questions we hear most often are "Is $600 monthly or annual?", "If our health premium is $500 a month and the quote shows $249 in savings, does our premium drop to $251?", and "Is that total per payroll or per year?"

Here's the employer's net savings per participant at every common pay frequency:

To convert any annual figure, divide it by the number of pay periods in your year. For a group total, multiply the per-participant figure by your number of participants.

For example, 100 participants at about $600 is about $60,000 a year, or about $2,500 per semi-monthly pay period.

Tax savings are not a premium discount. Savings show up as lower tax withholding on each paycheck and lower employer FICA deposits. They don't show up as a lower invoice from your health carrier.

If a quote shows $249 in monthly savings next to a $500 premium, your premium is still $500. The savings are separate dollars that stay in payroll.

Before you trust any savings figure, from us or anyone else, check that it tells you four things:

• Is it per participant or a group total?

• Is it monthly, annual, or per pay period?

• Is it before or after fees?

• Is it the employer's savings, the employee's, or both combined?

If a quote doesn't label all four, ask.

Can an Employee's Paycheck Go Down? Edge Cases to Catch Before Go-Live

Here's the honest answer to "Is there any scenario where a paycheck goes down?" The math isn't identical for everyone, and pretending otherwise is how programs lose employee trust.

Start with the floor. Every participant saves at least the FICA portion on their pretax amount, and the plan is designed so that FICA savings alone cover the employee admin fee.

Employees who also have federal or state income tax withheld save more on top of that. Employees with little or no income tax withholding save mostly on FICA, so their margin is small. That's why we model each person.

Employees above the Social Security wage base save 1.45% on FICA, so their income tax savings do more of the work.

The math gets thinner, or needs a closer look, in a few situations:

• Low-hours pay periods. If a period's wages can't carry the full deduction alongside existing pretax deductions like health premiums or retirement deferrals, the stub won't calculate as modeled.

• Little or no income tax withholding. Employees with large dependent credits or lower wages save mostly on FICA.

• States without income tax, like Tennessee, Texas, and Florida. Savings are smaller there, but still positive.

• Income-based tax credits. Lowering taxable income can shift credits like the Earned Income Tax Credit, sometimes up and sometimes down.

• High earners, employer side only. Social Security tax stops once an employee's wages reach the 2026 wage base of $184,500. Above that point, employer savings drop from 7.65% to 1.45%. We covered this in our FICA mechanics post.

Here's how each of those gets caught before anyone's real paycheck runs:

1. Eligibility screen. Participants must be W-2 employees working 30+ hours a week with qualifying major medical coverage.

2. Per-employee model. Anyone whose projected net change is near or below zero is flagged, and we review them with you before enrollment opens.

3. Mock payroll. Before your effective date, we run a full trial payroll through your actual system (ADP, Paychex, Gusto, QuickBooks, and others), and you compare the stubs yourself.

How a Section 125 Plan Affects Taxes, Mortgages, and Social Security

These three questions come up in almost every enrollment meeting. It's better to answer them in the announcement than in the hallway.

Tax time. Employers calculate income tax withholding on taxable wages each pay period, following the IRS withholding methods. Because taxable wages are lower, withholding adjusts as the year goes. The plan on its own doesn't create a balance due in April, and employees file their returns the same way they always have.

Mortgages and loans. Box 1 of the W-2 will show less than gross pay. That's the same thing that happens with any pretax deduction, like health premiums or 401(k) contributions. Gross pay on paystubs doesn't change. When a lender verifies income, employees can point to gross pay on their paystubs. On 2026 W-2s, the Section 125 amount may also appear in Box 14a, which the IRS split off from the old Box 14 this year. \Thrive also provides a letter explaining the plan for lenders.

Social Security. This one deserves a straight answer. Under SSA's own regulations, qualified benefits under a Section 125 cafeteria plan aren't counted as wages, which means pretax amounts don't appear as earnings on the employee's Social Security record. Lower credited earnings can mean a somewhat lower future benefit.

How much it matters depends on how Social Security calculates retirement benefits. SSA indexes lifetime earnings, averages the 35 highest-earning years, and applies a formula that replaces a larger share of lower earnings than higher earnings. So the effect depends on three things:

• How many years the employee participates

• Where their earnings fall in the benefit formula

• Whether those participation years land among the employee's 35 highest-earning years

This effect isn't unique to wellness programs. Every pretax health, dental, and vision premium your employees pay today works the same way.

Still, we'd rather your team see it up front than hear about it later.

Built for employers who can't afford a surprise on payday

Plenty of vendors can put a pretax deduction in your payroll system. Far fewer can show you, employee by employee, what that deduction does to every check before it runs.

Thrive was built for the groups where that matters most: medical practices with eight people on staff, nonprofits where every dollar is already spoken for, and assisted living facilities with large hourly workforces.

• Employee-by-employee modeling from the payroll file you already run

• Fees shown on the stub, for both the employer and the employee

• Plan documents provided and maintained at no cost to you

• Direct payroll integration with ADP, Paychex, Gusto, QuickBooks, and more

• A full mock payroll before your effective date

Want to see what it does to your team's paychecks before you commit to anything? Request a zero-commitment savings preview built from your own payroll data.

Frequently Asked Questions

Q: Can an employee's paycheck go down after enrolling in a Section 125 wellness plan?
A: In a properly modeled plan, participants should see net pay hold steady or rise. Low-hours pay periods and a few tax situations can thin the margin, which is why every participant should be modeled individually and verified in a mock payroll before go-live.

Q: Is the admin fee taken pretax or post-tax?
A: Yes, the fees are paid post tax

Q: Is a quoted savings figure monthly or annual?
A: It should say. Our $597 employer figure is annual, per participant, and net of fees. If any quote doesn't state its units, ask before you model with it.

Q: How do I convert annual savings to a semi-monthly figure?
A: Divide by 24. For biweekly payroll, divide by 26. For weekly, divide by 52.

Q: Does a pretax plan hurt a mortgage application?
A: W-2 Box 1 will be lower, as it is with any pretax deduction, but gross pay is unchanged. Lenders can verify gross income from paystubs, and Thrive provides a supporting letter.

Q: Does it lower future Social Security benefits?
A: It can, modestly, because Section 125 amounts aren't credited as Social Security earnings. The effect depends on years of participation and each employee's earnings history. Every pretax health premium works the same way.

Further Reading

• FICA Mechanics & Skepticism

• SIMRP Legal & Compliance Review

• Broker & Coverage Compatibility

Sources & Citations

1. IRS Publication 15-B (2026), Employer's Tax Guide to Fringe Benefits

2. IRS Topic No. 751, Social Security and Medicare Withholding Rates

3. Social Security Administration, Contribution and Benefit Base

4. 20 CFR §404.1053, Qualified Benefits Under a Cafeteria Plan

5. Social Security Administration, Your Retirement Benefit: How It's Figured

6. IRS Publication 15-T, Federal Income Tax Withholding Methods

7. IRS General Instructions for Forms W-2 and W-3