How to Calculate Employer Payroll Tax Savings

Every employer in the United States pays FICA taxes on every dollar of taxable wages. The rate is fixed at 7.65% — 6.2% for Social Security and 1.45% for Medicare — and there are no standard deductions or credits that reduce the obligation. For a business with 50 employees earning an average of $55,000, that amounts to $210,375 per year in employer FICA alone. Understanding how to calculate the savings available through pre-tax benefit structures is the first step toward reducing that number.

This article walks through the FICA calculation step by step, explains how pre-tax deductions reduce the taxable base, and provides a worked example using the SIMRP (Self Insured Medical Reimbursement Program) model to show exactly how much an employer can save.

Step 1: Understand the FICA Rate Breakdown

FICA stands for the Federal Insurance Contributions Act. It funds two programs: Social Security and Medicare. Both the employer and the employee pay FICA, each at the same rate:

• Social Security (OASDI): 6.2% on wages up to the Social Security wage base ($176,100 in 2026). Both employer and employee pay this rate, for a combined 12.4%.
• Medicare (HI): 1.45% on all wages with no cap. Both employer and employee pay this rate, for a combined 2.9%. Employees earning over $200,000 pay an additional 0.9% Medicare surtax, but this does not affect the employer's rate.
• Combined employer FICA rate: 6.2% + 1.45% = 7.65% on every dollar of taxable wages (up to the Social Security wage base for the 6.2% portion).

The key insight: FICA is calculated on taxable wages, not gross wages. Any dollar that can be moved from taxable wages to a non-taxable category reduces the employer's FICA obligation by 7.65 cents. This is the mechanism that makes pre-tax benefit deductions valuable — not just for income tax purposes, but for payroll tax purposes.

Step 2: Calculate Your Current FICA Obligation

Before calculating savings, you need to know your baseline. The formula is straightforward:

For example, a company with 50 employees earning an average of $55,000 per year has a total taxable payroll of $2,750,000. The employer's annual FICA obligation is:

This is the number you are trying to reduce. Every pre-tax deduction that shrinks the $2,750,000 base will proportionally reduce the $210,375 FICA obligation.

Step 3: Calculate the Pre-Tax Deduction Impact

When an employee takes a pre-tax deduction through a Section 125 cafeteria plan, that amount is subtracted from their gross wages before FICA is calculated. The employer's FICA savings equal the deduction amount multiplied by 7.65%. Here is the formula:

Under the SIMRP model used by the Preventive Care Benefits Program, each enrolled employee takes a $1,220 monthly pre-tax deduction through the Section 125 plan. Applying the formula:

• Monthly savings: $1,220 × 7.65% = $93.33 per employee
• Annual savings: $93.33 × 12 = $1,119.96 per employee

Step 4: Scale the Calculation to Your Workforce

Once you know the per-employee savings, scaling to your full workforce is simple multiplication. Here are examples across common company sizes:

For a precise calculation based on your exact headcount, use the savings calculator to generate a customized projection.

Step 5: Understand the SIMRP Mechanism

The reason the SIMRP generates savings without reducing employee take-home pay is the pre-tax/post-tax payroll restructuring. Here is how the payroll flow works for each pay period:

• Step A: The employee's gross wages are reduced by $1,220 through a Section 125 pre-tax deduction. This reduces FICA-taxable wages by $1,220.
• Step B: The employer's FICA obligation on that employee drops by $93.33 ($1,220 × 7.65%). The employee's FICA withholding also drops by the same amount.
• Step C: The employee receives a $1,220 post-tax WIMPER (Wellness Incentive Medical Plan with Employer Reimbursement) reimbursement. This reimbursement qualifies under IRC §105(b) as a medical expense reimbursement excluded from gross income.
• Net result: The employee's take-home pay is unchanged. The employer saves $93.33. The employee gains access to over 1,000 preventive care benefits including prescriptions, telemedicine, life insurance, and mental health services.

Worked Example: 50-Employee Company

Let's walk through a complete calculation for a company with 50 W-2 employees, average salary of $55,000:

• Current annual FICA: 50 × $55,000 × 7.65% = $210,375
• Annual pre-tax deduction per employee: $1,220 × 12 = $14,640
• Total annual payroll reduction: 50 × $14,640 = $732,000
• FICA savings on reduction: $732,000 × 7.65% = $55,998
• New annual FICA: $210,375 − $55,998 = $154,377
• Percentage reduction: 26.6% decrease in employer FICA obligation

That is $55,998 per year in savings — $279,990 over five years — with no out-of-pocket expenses for the employer and no reduction in employee compensation.

Important Considerations

Several factors can affect the actual savings:

• Social Security wage base: The 6.2% Social Security portion of FICA only applies to wages up to $176,100 in 2026. Employees earning above this threshold already have the 6.2% capped, so the SIMRP deduction produces only the 1.45% Medicare savings for wages above the cap. The majority of employees in small and mid-sized businesses earn below the wage base, so the full 7.65% savings applies.
• Participation rate: Savings calculations assume all eligible employees are enrolled. The Preventive Care Benefits Program typically achieves enrollment rates above 90% because employees receive comprehensive benefits at no change to their net pay.
• Payroll cycle timing: Savings begin on the first payroll cycle after enrollment. There is no waiting period or retroactive adjustment — the FICA reduction appears immediately on the next pay run.

Calculate Your Savings

The math is straightforward, but every business is different. Use the savings calculator to input your exact employee count and see a customized projection of your annual and multi-year FICA savings. Or learn more about how the program works for employers to understand the full implementation process.