IBR vs RAP vs SAVE: Which Student Loan Repayment Plan Is Best for You?

Last updated: 2025 | Category: Personal Finance / Student Loans | Reading time: ~8 min

If you have federal student loans, you’ve probably heard the alphabet soup of repayment plans: IBR, SAVE, PAYE, ICR — and now RAP. With the student loan landscape shifting again in 2025–2026, millions of borrowers are asking the same question: which income-driven repayment plan actually saves me the most money?

This guide breaks down the three most relevant income-driven repayment (IDR) plans available right now — IBR, SAVE, and RAP — and tells you exactly who each one is best for, how much you’d pay, and what the catch is with each option.

📋 In This Article

What Are Income-Driven Repayment Plans?

Income-driven repayment (IDR) plans cap your monthly student loan payment at a percentage of your discretionary income — the money left over after accounting for basic living expenses. After making qualifying payments for a set number of years, any remaining balance is forgiven.

These plans are designed for borrowers whose loan balances are high relative to their income — which describes a massive share of Americans today. The average federal student loan borrower carries around $37,000 in debt, and for graduate school borrowers, that number can easily exceed six figures.

Unlike the Standard Repayment Plan (which spreads payments evenly over 10 years regardless of what you earn), IDR plans make your payment flexible. Earn less, pay less. Earn more, pay more — but always with a ceiling.

There are currently four main IDR plans offered by the federal government. This article focuses on the three most relevant ones in 2025–2026: IBR, SAVE, and the newly proposed RAP.

IBR: Income-Based Repayment

Income-Based Repayment (IBR) is one of the oldest and most established IDR plans. It’s available to almost all federal loan borrowers and has a strong legal track record — which matters more than ever as newer plans face court challenges.

How IBR Works

Your monthly payment under IBR depends on when you first borrowed:

New borrowers (on or after July 1, 2014): Pay 10% of discretionary income. Remaining balance forgiven after 20 years.
Older borrowers (before July 1, 2014): Pay 15% of discretionary income. Remaining balance forgiven after 25 years.

Discretionary income under IBR is calculated as the difference between your adjusted gross income (AGI) and 150% of the federal poverty guideline for your family size.

What IBR Does Well

IBR is one of the most legally stable plans available. Unlike SAVE, which has been tied up in court litigation, IBR has been in place since 2009 and has survived multiple administrations. It also works with a broader range of loan types, including some older FFEL loans that don’t qualify for newer programs.

The Downside

The main drawback is that 10–15% can still add up to a meaningful monthly payment for borrowers with moderate incomes. You also won’t benefit from the interest subsidy that SAVE offers — meaning your balance can grow if your payment doesn’t cover all the accruing interest.

✅ IBR is best for: Borrowers with older FFEL loans, those pursuing Public Service Loan Forgiveness (PSLF), and anyone who wants a proven, legally stable repayment option.

SAVE: Saving on a Valuable Education

The SAVE plan replaced the old REPAYE (Revised Pay As You Earn) plan and was rolled out as the most generous IDR option the government has ever offered. For borrowers with undergraduate debt and modest incomes, SAVE can cut monthly payments nearly in half compared to IBR.

How SAVE Works

SAVE uses a more generous formula than other IDR plans:

Undergraduate loans: Payments capped at just 5% of discretionary income.
Graduate loans: Payments capped at 10% of discretionary income.
Mixed debt (undergrad + grad): A weighted average between 5% and 10%, based on how much of your debt is from each category.

SAVE also uses a more generous definition of “discretionary income” — it protects 225% of the federal poverty line rather than 150% — meaning more of your earnings are shielded from the payment calculation.

The Interest Subsidy: SAVE’s Biggest Advantage

One of SAVE’s most powerful features is its interest protection rule. If your monthly payment doesn’t cover all the interest accruing on your loans, the federal government covers the difference. This means your loan balance will never grow as long as you’re making payments — even if those payments are $0/month because your income is below the threshold.

For borrowers who’ve watched their balance balloon despite making regular payments, this is a game-changer.

Faster Forgiveness for Small Balances

If you originally borrowed $12,000 or less, you could qualify for forgiveness in as little as 10 years under SAVE. For every additional $1,000 borrowed above $12,000, one year is added to the timeline, up to the standard 20–25 year maximum.

The Catch: Legal Uncertainty

SAVE has faced significant legal challenges. Multiple federal courts have issued rulings blocking parts of the plan, and many enrolled borrowers have been placed in an interest-free forbearance while the litigation plays out. The plan’s long-term future depends on how these court cases are ultimately resolved.

This isn’t necessarily a reason to avoid SAVE — being in forbearance during litigation doesn’t hurt your credit — but it’s important context before enrolling.

✅ SAVE is best for: Low- to moderate-income borrowers with primarily undergraduate loans who want the smallest possible monthly payment and protection against interest growing their balance.

RAP: The Repayment Assistance Plan

The Repayment Assistance Plan (RAP) is the newest proposed IDR option, introduced as part of the federal government’s response to the legal battles surrounding SAVE. While it hasn’t fully launched yet, it’s expected to be available to new borrowers entering repayment from July 1, 2026 onward.

How RAP Works

Instead of applying a flat percentage to your discretionary income, RAP uses a sliding payment scale based on income brackets:

Borrowers earning below approximately 150% of the federal poverty line would owe $0/month.
As income rises, payments increase incrementally — but always stay capped relative to income.
Forgiveness kicks in after 20 years of payments.
RAP also includes interest protections similar to SAVE’s subsidy, preventing runaway balance growth.

Who Can Enroll in RAP?

RAP is primarily designed for new borrowers who take out federal student loans on or after July 1, 2026. Current borrowers may or may not have the option to switch, depending on how the final regulations are written. Details are still being finalized as of 2025.

Why RAP Exists

RAP was created partly to sidestep the legal vulnerabilities that brought down SAVE. By being structured differently, it aims to be more defensible if challenged in court. Think of it as a legally hardened version of the income-driven philosophy behind SAVE.

✅ RAP is best for: Incoming students and new borrowers starting repayment in 2026 or later who want a modern, income-sensitive plan designed for today’s economic landscape.

Head-to-Head: IBR vs SAVE vs RAP

Here’s how the three plans stack up on the key metrics that matter most to borrowers:

	IBR	SAVE	RAP
Monthly payment	10–15% discretionary	5–10% discretionary	Sliding scale
Loan forgiveness	20–25 years	10–25 years	20 years
Interest protection	❌ No	✅ Yes	✅ Yes
Available to all borrowers	✅ Yes	✅ Yes	⚠️ New only (2026+)
PSLF compatible	✅ Yes	✅ Yes	✅ Yes
Legal stability	🟢 High	🔴 Under review	🟡 Proposed
Loan types covered	Most federal loans	Direct loans only	Direct loans only

How to Choose the Right Plan for Your Situation

There’s no universal answer — the best plan depends on your income, debt amount, career goals, and what kind of loans you have. Here’s a decision framework:

Choose IBR if…

You have older FFEL loans that don’t qualify for SAVE or RAP
You’re pursuing PSLF and want the most legally stable payment-counting plan
You want a plan with a long proven track record that won’t be struck down by courts
You borrowed before July 1, 2014, and are eligible for the “old IBR” terms

Choose SAVE if…

You have primarily undergraduate debt and a lower-to-middle income
You want the lowest possible monthly payment right now
You’re worried about interest growing your balance faster than you can pay it down
You’re comfortable with some legal uncertainty in exchange for better terms

Look into RAP if…

You’re a new or prospective borrower taking out loans in 2026 or later
You want a modern income-based plan built from the ground up to be legally durable
You expect your income to grow significantly over time and want payments that adjust naturally

How These Plans Interact With PSLF

If you work for a government agency, nonprofit organization, or another qualifying public service employer, all three of these IDR plans can be paired with Public Service Loan Forgiveness (PSLF). PSLF wipes out your entire remaining balance after just 10 years of qualifying payments — and unlike standard IDR forgiveness, PSLF forgiveness is completely tax-free.

If you’re eligible for PSLF, your strategy should be to minimize your monthly payment — not pay off the loan quickly. Every dollar you don’t pay now is a dollar that gets forgiven in 10 years. That makes SAVE(or IBR for older loans) the ideal pairing with PSLF, since lower payments = more forgiven at the end.

Just make sure you’re enrolled in a PSLF-qualifying repayment plan and submitting your Employment Certification Form (ECF) annually. You can track your progress and check employer eligibility at studentaid.gov/pslf.

Bottom Line: Don’t Stay on the Wrong Plan

The biggest mistake borrowers make is staying on the Standard Repayment Plan when they’d be better off on an IDR plan. Standard repayment can cost hundreds of dollars more per month than necessary — money that could go toward retirement savings, an emergency fund, or simply keeping the lights on.

Here’s what to do next:

Log into studentaid.gov and use the Loan Simulator to see your estimated payments under each plan based on your actual income and loan balance.
Check your loan types — if you have FFEL loans, you may need to consolidate into Direct Loans before accessing newer plans.
Submit your IDR application — you can apply online through studentaid.gov at no cost.
Recertify your income annually — IDR payments are recalculated each year based on your latest tax return.

No matter which plan you choose, the important thing is to get on some income-driven plan if your current payments feel unmanageable. You can always switch plans later if your situation changes.