Should I pay off my student loan faster?

It removes the interest that the amount would have generated in every month still to come, and on the loan with the highest rate there is the most of it to remove. Two things come first: a buffer for unexpected costs, and any debt at a higher rate, which for most people means a credit card. The size of the effect on your own figures is what the app works out.

Why did my extra payment not reduce my balance?

Most likely it was held as a future payment or spread across every loan in the group instead of going to principal on one of them. Ask for it to be reapplied as principal-only on a named loan, and attach that instruction to every payment from now on.

Which student loan should I pay off first?

The one with the highest rate, as long as nothing is past due anywhere. That is what the avalanche order does, and it produces the least interest overall. Because a single bill hides the individual rates, this only becomes a decision once each loan is listed with its own balance and rate.

Why is my balance higher than what I borrowed?

Interest that accrued while you were not required to pay it was added to the principal, which is called capitalisation. Once added, it is principal and accrues interest itself. Paying accrued interest before it capitalises is the way to stop that happening again.

Should I refinance federal loans with a private lender?

It buys a rate and permanently gives up the options that come from the statute rather than from a contract. That is a trade worth making deliberately rather than as a side effect of shopping for a lower payment. The general question of when consolidating helps is covered in the piece on it.

Student loan payoff: one payment, several loans

A student loan bill looks like one debt. Behind it sit several loans, taken out in different years at different rates, and an extra payment does not automatically go to the dearest one.

By Deniz Erginos. Updated 25/09/2026

Most people with student debt have one servicer, one login and one monthly amount, and describe it as one loan. It rarely is. Each year of study normally produced its own loan, each at whatever rate applied then, and the bill you receive is the sum of their minimum payments. Nothing in that bill tells you which of them is expensive.

One payment, several loans

The distinction matters for one reason: interest runs separately on each loan at its own rate. Paying the bill in full every month keeps all of them on schedule and clears none of them early. Anything above the bill is a choice about which loan to attack, and it is only a real choice once you have the list in front of you: balance and rate for each loan, not the total.

Where an extra payment actually lands

Send a servicer more than the amount due and the surplus has several possible destinations, and only one of them does what you intended. It can go to the principal of a loan you name. It can be spread proportionally across every loan in the group, including the cheap ones. It can be held and counted towards your next bill, which moves the due date and leaves every balance where it was. Absent an instruction, the servicer applies its own default.

Principal on a named loan: What you want. The balance of the dearest loan drops, the interest it accrues from then on drops with it, and the group finishes sooner.
Spread across the group: The surplus is divided over every loan in proportion. Some of your money goes to loans that were costing you the least.
Held as a future payment: The due date moves out and nothing else changes. Balances and interest carry on exactly as before.

Capitalisation is why the balance grew

A student loan can end up larger than the sum that was borrowed, and the mechanism has a name. Where interest accrues in a period during which you are not required to pay it, during study or a deferment for instance, it does not simply sit there. At certain events the unpaid interest is added to the principal. From that moment on it is principal, and interest accrues on it too. That is capitalisation, and it is the reason a balance can be higher after a pause than before it.

For anyone deciding where to put spare money, that has one practical consequence: paying accrued interest before it capitalises stops it becoming principal. It is the one case where a payment that clears no principal at all still changes the arithmetic.

Federal and private are not the same product

Federal loans: Terms are set by statute and regulation rather than negotiated, which is why they carry options a bank loan does not. Those options change with policy, so check the current rules rather than what applied when you borrowed.
Private loans: An ordinary credit agreement with a lender. What it allows is in the contract: the rate, whether it is fixed or variable, and how a surplus payment is applied.
Refinancing the two together: Moving federal loans to a private lender ends the statutory options permanently in exchange for a rate. Worth deciding deliberately, and covered in the piece on consolidation.

This page describes how the arithmetic behaves. Which repayment or forgiveness route you qualify for is a question about current policy and your own record, and it belongs with your servicer or a counsellor rather than with an app.

Capitalisation on student loans, CFPBThe regulator explaining when unpaid interest becomes principal and what that does to the balance. The short answer to why a loan can grow while you are not paying it.

Paying student loans off faster, CFPBWhat to tell a servicer so a surplus goes to principal on the loan you choose rather than across the group or towards next month.

The app

The app carries each loan as its own sheet with its own rate and its own end date, and a shared date above them for the last one to finish. That is the view a single monthly bill hides. Everything stays on the phone, with no account and no bank connection.

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Common questions

Should I pay off my student loan faster?: It removes the interest that the amount would have generated in every month still to come, and on the loan with the highest rate there is the most of it to remove. Two things come first: a buffer for unexpected costs, and any debt at a higher rate, which for most people means a credit card. The size of the effect on your own figures is what the app works out.
Why did my extra payment not reduce my balance?: Most likely it was held as a future payment or spread across every loan in the group instead of going to principal on one of them. Ask for it to be reapplied as principal-only on a named loan, and attach that instruction to every payment from now on.
Which student loan should I pay off first?: The one with the highest rate, as long as nothing is past due anywhere. That is what the avalanche order does, and it produces the least interest overall. Because a single bill hides the individual rates, this only becomes a decision once each loan is listed with its own balance and rate.
Why is my balance higher than what I borrowed?: Interest that accrued while you were not required to pay it was added to the principal, which is called capitalisation. Once added, it is principal and accrues interest itself. Paying accrued interest before it capitalises is the way to stop that happening again.
Should I refinance federal loans with a private lender?: It buys a rate and permanently gives up the options that come from the statute rather than from a contract. That is a trade worth making deliberately rather than as a side effect of shopping for a lower payment. The general question of when consolidating helps is covered in the piece on it.