FICA Savings and DCFSA: The Numbers Your Clients Need to See
One of the most underused arguments in a benefits consultant's toolkit is the FICA savings math behind the Dependent Care FSA. Every dollar an employee elects into a DCFSA bypasses the 7.65% employer-side payroll tax (Social Security plus Medicare). The savings are automatic, the math is clean, and most CFOs have never been walked through it. Let's fix that.
The Base Formula
The model is straightforward:
Employer FICA savings = (Number of eligible employees) x (Participation rate) x (Average annual election) x 7.65%
That is it. Three inputs and a fixed multiplier. The trick is showing clients what those inputs look like at realistic scenarios.
Worked Example: 500-Person Employer
Let's use a typical mid-market client: 500 employees, 40% with DCFSA-eligible dependents (so 200 eligible employees), and an industry-standard average annual election of $3,000 per participating employee.
Scenario A: 10% participation
200 eligible employees x 10% = 20 participants
20 participants x $3,000 average election = $60,000 in DCFSA contributions
$60,000 x 7.65% = $4,590 in annual employer FICA savings
Note that this also drops $60,000 of taxable wages off the employee side, generating real take-home pay increases for the employees in question. The benefit is bilateral. But for the CFO conversation, stay focused on the $4,590.
Scenario B: 25% participation
200 eligible employees x 25% = 50 participants
50 participants x $3,000 = $150,000 in DCFSA contributions
$150,000 x 7.65% = $11,475 in annual employer FICA savings
Moving from 10% to 25% participation more than doubles the FICA return. That participation lift is exactly what a SitterSync-enabled DCFSA, or any modernized DCFSA experience, is designed to produce.
Scenario C: 50% participation
200 eligible employees x 50% = 100 participants
100 participants x $3,000 = $300,000 in DCFSA contributions
$300,000 x 7.65% = $22,950 in annual employer FICA savings
50% is aspirational but not unreasonable for an employer who actually treats the DCFSA as a benefit rather than a footnote. At that level, you are looking at a five-figure annual return on what was historically a zero-cost program line.
What Happens at Higher Elections
The 2025 DCFSA cap moved from $5,000 to $7,500, the first meaningful increase in decades. If average elections drift up from $3,000 to, say, $5,000 (still below the new cap), the math gets even more attractive. Same 500-person employer, 25% participation, $5,000 average election:
50 participants x $5,000 = $250,000 in contributions
$250,000 x 7.65% = $19,125 in annual FICA savings
The cap increase is not just a win for families. It is a quiet expansion of the employer-side savings ceiling. Most clients have not been told.
How to Frame This for Clients
When you present this math, do three things:
Start with their actual numbers. Pull their headcount, model the eligible population from their demographic data, and ask the TPA for current participation. Do not use a generic deck.
Show the gap, not just the opportunity. The lift from 6% to 25% participation is what generates the additional savings. If you only show the high-participation scenario, the client will not see the path. Show all three scenarios side by side.
Land the message: "You are not selling a perk, you are selling a return." The DCFSA is the rare benefit where the employer gets a measurable, recurring financial return on an employee program. That changes the procurement conversation entirely.
The Compounding Effect
Two things compound over multiple plan years. First, employees who use the DCFSA successfully in year one tend to re-elect at higher amounts in year two. So average election rises naturally over time. Second, participation begets participation: when employees see coworkers using a benefit successfully, the social proof drives the next cohort. A program at 10% in year one frequently reaches 18 to 22% by year three with no additional employer investment.
For a CFO planning multi-year, that is a quietly attractive curve. The same line item generates more return each year, and the marginal cost to the employer is essentially zero.
Bring This Math to Every Renewal
Most DCFSA conversations stall at "we offer one." The conversation that wins business is the one that says: "You offer one, and here is what it is actually worth at the participation rate you have versus the participation rate you could have." That is a return-on-program conversation, and it is the one most consultants are not having.
The numbers do the work. You just have to show them.