Everything on this site about "total cost" and "tax bombs" has an asterisk, and the asterisk is Public Service Loan Forgiveness. If you work full-time for a government or 501(c)(3) employer, the 2026 rules leave PSLF's core deal intact: 120 qualifying monthly payments, then the entire remaining balance is forgiven — still federally tax-free. RAP is a qualifying repayment plan, and so is IBR.
That flips the optimization upside down. A non-PSLF borrower usually wants to minimize total dollars paid, which often means paying more per month. A PSLF borrower wants to minimize the sum of exactly 120 payments — every dollar not paid in those ten years is a dollar forgiven at the end. The right plan is simply the one with the lowest qualifying payment.
RAP or IBR: which payment is lower?
For a single borrower with no dependents, the crossover sits in a predictable place, because the two formulas are shaped differently. RAP charges a percentage of your entire AGI (1–10% by bracket); IBR charges 10% or 15% of income above 150% of the poverty line ($23,940 for a household of one in 2026).
| AGI (single, no deps) | RAP | IBR at 10% | IBR at 15% | Lower payment |
|---|---|---|---|---|
| $30,000 | $50.00 | $50.50 | $75.75 | RAP (barely) |
| $45,000 | $150.00 | $175.50 | $263.25 | RAP |
| $60,000 | $250.00 | $300.50 | $450.75 | RAP |
| $80,000 | $466.67 | $467.17 | $700.75 | tie |
| $95,000 | $712.50 | $592.17 | $888.25 | IBR (10%) |
| $120,000 | $1,000.00 | $800.50 | $1,200.75 | IBR (10%) |
The pattern: below roughly $80,000 AGI, RAP's payment is lower; above it, new-borrower IBR wins — the poverty-line deduction matters more as the 10% flat rate beats RAP's 9–10% brackets. (Old-borrower IBR at 15% almost never beats RAP.) Dependents shift the crossover: RAP's $50-per-dependent credit is a flat cut, while IBR's family-size deduction grows the exempt income — run your own numbers in the calculator. And remember the IBR payment cap and the 60-payment SAVE lockout rule that may close IBR to you entirely.
Three PSLF-specific rules worth money
- The $10 floor still counts. A PSLF-track borrower with very low income pays $10 a month on RAP, and every one of those months counts toward 120. Ten years of $10 payments — $1,200 total — followed by full tax-free forgiveness is the best deal in the entire student loan system. On IBR the same borrower might legitimately pay $0, which also counts.
- Don't prepay. Paying extra shrinks the balance PSLF will forgive and can push you into paid-ahead status, which suspends qualifying months. If you have spare cash and PSLF is the plan, save it elsewhere until the 120th payment clears.
- Certify employment annually. Submit the employer certification through the PSLF Help Tool at studentaid.gov every year (and at every job change), not once at year ten. Payment counts disputed a decade later are miserable to reconstruct.
One state-tax footnote
PSLF forgiveness is tax-free federally everywhere. At the state level, Mississippi stands alone in taxing PSLF discharges as income. Everywhere else, PSLF's tax treatment survived the 2026 expiry untouched.
The decision in one paragraph
Confirm your employer qualifies (the PSLF Help Tool checks the EIN), then enroll in whichever of RAP or IBR gives you the lower payment at your income — the calculator shows both side by side — certify employment yearly, make 120 on-time payments, and let the balance be someone else's problem. For PSLF borrowers, the "which plan costs less over 25 years" question this site spends so much ink on simply doesn't apply: the answer is whichever bill is smallest this month.
Run your own numbers
Every figure in this guide came from our calculator — the same math, on your loans, in 30 seconds. No signup.