🚌Pretax Commuter Benefit Savings Calculator

Calculate transit-pass cashback from monthly ride count

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How to Use the Pretax Commuter Benefit Savings Calculator

Korea's K-Pass program pays back 20% to 53.3% of your transit spending in cash the month after you hit 15 rides. The U.S. has no matching cashback program. Instead, the comparable federal benefit is the pretax commuter benefit: if your employer offers a qualified transportation fringe benefit plan, you can set aside part of your paycheck before taxes to pay for transit, which lowers your taxable income rather than refunding cash directly.

The IRS caps how much you can set aside pretax each month — $325 as of 2025, adjusted for inflation most years. Any transit spending above that limit has to come out of your after-tax pay and gets no benefit. Because the money is deducted before both federal income tax and payroll (Social Security and Medicare) tax, your real savings equal the eligible amount multiplied by your marginal income tax rate plus 7.65% in payroll tax.

This calculator estimates that combined savings rate for you. It's not a refund you receive — it's tax you never pay in the first place, showing up as slightly higher take-home pay throughout the year rather than a lump sum. You'll need your employer to actually offer the benefit and enroll you in it to access these savings.

Frequently Asked Questions

Is this the same as Korea's K-Pass transit cashback?

No. K-Pass directly refunds 20-53.3% of your transit spending in cash the following month once you hit 15 rides. The U.S. has no direct cashback program like this — instead, employers can offer a pretax commuter benefit, which lowers your taxable income rather than sending you a refund.

What is the monthly limit for pretax commuter benefits?

The IRS sets an annually adjusted monthly limit for pretax transit benefits — $325 per month as of 2025, typically rising slightly each year for inflation. Spending above that limit must be paid with after-tax dollars and gets no tax benefit.

Do I need my employer to offer this?

Yes. Pretax commuter benefits are only available if your employer sets up a qualified transportation fringe benefit plan. If your employer doesn't offer one, you can't access this pretax savings — ask your HR or benefits team whether a plan is available.