IBR vs PAYE vs Standard Repayment on an $80K Student Loan: What the SIMPLE Act's 'Lowest Payment' Rule Could Cost You

Here's a scenario I used to see constantly when I worked loan servicing: a borrower falls 75 days behind, gets a call center rep who reads a script, and ends up "helped" onto whatever plan drops their bill the fastest. Nobody asks what that plan does to the total balance over the next two decades. The bill goes down. The case gets closed. Everyone moves on — except the borrower, who's now locked into a plan that's quietly going to cost tens of thousands more than if they'd just stayed the course.

That's the exact mechanism Rep. Bonamici's SIMPLE Act is trying to build into law. Per The College Investor's coverage of the bill, starting in July 2028, the Department of Education would use IRS income data to automatically place borrowers who are 75+ days delinquent into the income-driven repayment plan with the lowest current monthly payment — no application required. Given that Senators Warren, Merkley, Booker, and Van Hollen are currently demanding ED explain how it's spending the $1 billion OBBBA borrower-support fund while defaults have climbed to 9 million borrowers, it's easy to see why "auto-enroll the strugglers into something, anything" sounds like a good idea.

It is a good idea, as a backstop against default. But "lowest payment right now" and "lowest total cost over the life of the loan" are two completely different numbers. Let's run an $80,000 loan through both definitions and see how far apart they land.

The setup: $80,000, $58,000 income, 6.5% interest

Say you've got $80,000 in federal loans at a 6.5% weighted average rate, you're single, earning $58,000 a year, and you're not working toward Public Service Loan Forgiveness. Three plans are on the table: Standard 10-year repayment, IBR (the 15%-of-discretionary-income, 25-year-forgiveness version for older borrowers), and PAYE (10%-of-discretionary-income, 20-year-forgiveness).

First, the number every IDR plan is built on: discretionary income. It's your adjusted gross income minus 150% of the federal poverty guideline for your household size. Using the poverty guideline for a household of one (roughly $15,650), 150% of that is $23,475.

$58,000 − $23,475 = $34,525 in discretionary income

That single number determines your payment on every IDR plan you'll ever be offered. Here's what it produces:

Plan	Formula	Monthly Payment	Term	Forgiven Balance (est.)	Tax Bomb (est.)	Total Cost (est.)
Standard	Amortized, no IDR formula	$908	10 years	$0	$0	~$108,960
IBR (15%/25yr)	15% × discretionary income	$432	up to 25 years	~$8,000	~$1,760	~$186,760
PAYE (10%/20yr)	10% × discretionary income	$288	up to 20 years	~$52,000	~$11,440	~$109,840

(These totals are a modeled example assuming 3% annual income growth, payments recalculated at each recertification, and a 22% federal tax rate applied to the forgiven balance at the end of the term. Your actual trajectory will differ — this is exactly the kind of multi-year projection you can run for your own numbers at Talovex instead of estimating by hand.)

Look at what just happened. The Standard plan has by far the highest monthly payment — nearly 3x IBR's — but it's the second-cheapest option overall. PAYE, with the lowest monthly payment of the three, ends up costing almost exactly the same as Standard, because the shorter 20-year term and faster income growth let it amortize down reasonably well before forgiveness kicks in. IBR, sitting in the middle on monthly payment, is by far the most expensive option — $77,800 more than Standard — because the 25-year term gives the balance an extra five years to compound before any forgiveness offsets it.

This is the exact pattern I've watched trip up hundreds of borrowers: the ranking of plans by monthly payment tells you nothing about the ranking of plans by total cost.

Why does my balance keep going UP when I'm paying every month?

This is the question I got more than almost any other in eight years of servicing calls, and it's the mechanism behind IBR's bad number above. Look at the interest accrual on an $80,000 balance at 6.5%: that's $433.33 a month, every month, regardless of what you pay.

• On IBR, your $432 payment is almost covering that interest. You're basically treading water in year one.
• On PAYE, your $288 payment covers barely two-thirds of the monthly interest. The other $145 a month doesn't disappear — it accrues, and depending on the plan and what triggers your servicer applies (switching plans, missing recertification, exiting IDR), it can capitalize onto your principal, meaning you start paying interest on your unpaid interest.

Over enough years, rising income closes that gap and your payment starts actually reducing principal. But in the early years — precisely when a newly-delinquent borrower would be getting auto-enrolled under the SIMPLE Act — that gap is the widest it will ever be. A policy built to rescue struggling borrowers from default could, without additional guardrails, be quietly enrolling them into the years where their balance grows the fastest.

The eligibility trap the SIMPLE Act doesn't solve

Here's the part that doesn't show up in the bill summary: not every borrower can access every plan. PAYE — the plan that produced the best total-cost outcome in our table — has a "new borrower" requirement. You generally need to have had no outstanding balance on a FFEL or Direct Loan as of October 1, 2007, and to have received a new loan after October 1, 2011. A lot of the borrowers now sitting in that 9-million-person default pool have older FFEL or Stafford loans predating that cutoff. If your loans are older, PAYE isn't on the menu — your only IDR option might be old-style IBR at 15%/25 years, the most expensive plan in our comparison.

That means the SIMPLE Act's "lowest current payment" logic could, for an eligible-for-everything borrower, correctly select PAYE and land close to the cheapest outcome. But for a borrower with older FFEL debt, "lowest current payment among what's actually available to you" might mean IBR — the plan that costs $77,000 more than doing nothing fancy at all. Same bill, same good intentions, wildly different outcomes depending on loan vintage. If that's your situation, it's worth reading through the total-cost math on FFEL and Stafford loan consolidation before any auto-enrollment mechanism makes the choice for you.

What about the plan menu changing under you?

There's a second layer of uncertainty here that the SIMPLE Act's 2028 start date runs straight into: the IDR plan menu itself is not stable. SAVE is gone. RAP is phasing in as the new default plan for anyone entering repayment or IDR going forward. IBR and PAYE are increasingly "grandfathered" options rather than the front door. By the time this bill's auto-enrollment mechanism goes live, the "lowest payment plan" it's choosing from may not be IBR or PAYE at all — it could be RAP, with its own formula and its own total-cost profile. If you want to see how RAP compares to the legacy plans on a real balance, the RAP vs IBR breakdown on a $90K loan walks through that math directly. This is the kind of comparison work that's genuinely hard to keep current by reading policy news — it's exactly what Talovex is built to re-run every time a rule changes, so your numbers reflect this year's rules, not 2023's.

Avalanche, snowball, or just recertify correctly?

If you're not delinquent and you're just trying to decide how aggressively to attack an $80,000 balance, the debt-avalanche instinct — throw extra money at the highest-rate loan first — still works fine for private loans. But federal IDR changes the math entirely, because extra payments on a loan that's tracking toward forgiveness can actually make you worse off if they shrink the eventual forgiven (tax-free-in-some-states, taxable-in-others) balance without shortening your term. We modeled this tension in detail in Avalanche vs Snowball vs IBR on $65K in loans — the short version is that the "pay extra" instinct only helps if you've already confirmed you're not on a forgiveness track.

Don't wait for the IRS to auto-enroll you into an answer

Here's the uncomfortable truth: even if the SIMPLE Act passes exactly as written, it won't be live until July 2028, and it's explicitly a reactive mechanism — it only kicks in after you're already 75 days delinquent. It's a backstop for people who've fallen through the cracks, not a repayment strategy. And given that ED can't currently account for $216 million of the $1 billion Congress already gave it for borrower support, per the senators' letter to the Department, I wouldn't bet my $80,000 balance on the accuracy of a fully automated, IRS-data-driven plan assignment showing up flawlessly on day one.

The math above is one scenario — one balance, one income, one interest rate, one household size. Change any of those inputs and the ranking of "cheapest plan" can flip entirely. That's the whole point: there's no universal answer to "which plan is lowest cost," only your answer, run against your numbers. Before your next IDR recertification — or before any auto-enrollment letter shows up in your mailbox — model your actual balance, income, and loan type at Talovex and know which plan is cheapest for you, not which one just happens to have the lowest sticker price this month.

Sources

• New Bill Would Use IRS Data To Automatically Put Struggling Student Loan Borrowers Into Low Payments — The College Investor
• Senators Demand ED Account for $1 Billion Student Loan Fund as Defaults Hit 9M — The College Investor
• How Do You Calculate Current Net Worth Of Assets For FAFSA — The College Investor
• CIT Bank Platinum Savings APY Boost: Earn 4.10% For 6 Months — The College Investor
• With HSAs, employers are turning to the 401(k) playbook — CNBC Personal Finance