Paying Off Student Loans Fast

If forgiveness is not in your future, the fastest way out of student debt is also the cheapest: every extra dollar you send to the loan earns a return equal to its interest rate, guaranteed, with no market risk. But extra payments only help if they reach the right loan, if they do not leave you without a cushion, and if you keep making them for years. This chapter shows when paying fast makes sense, what extra payments actually save, how to make sure your servicer applies them the way you intend, and how to keep going once the novelty wears off.

First, check that paying fast is the right lane

Paying ahead is the right move for some loans and the wrong one for others. Before you start, check four things.

• You are not on track for forgiveness. If you expect Public Service Loan Forgiveness, or a large balance forgiven under an income-driven plan, extra payments shrink a balance that would otherwise have been erased. Chapters 3 and 4 cover those paths.
• You have a cash cushion. Money sent to a loan is hard to get back. Without an emergency fund, one surprise bill can end up on a credit card at a much higher rate. The emergency fund calculator sizes the target.
• You are collecting your full employer match. A match that adds half or all of what you contribute is a better return than paying off almost any student loan. The 401(k) contribution and match calculator shows whether you are leaving any behind.
• Higher-rate debts come first. A credit card balance usually costs far more than a student loan.

Beyond that, the choice between paying the loan and investing comes down to the loan's rate against what investing might earn, after tax and with risk counted. A loan at a high rate is a strong case for paying it down; a loan at a low rate is a closer call. The pay off debt or invest calculator runs the comparison with your numbers.

What extra payments do

Every extra dollar goes to principal, so the next month's interest is charged on a smaller balance. The saving compounds the same way interest does, which is why modest amounts make a large difference over a decade.

On the 10-year schedule, a $40,000 loan at 6.8% costs $460 a month and $15,239 in interest. Adding $100 a month clears it in 92 months instead of 120 and saves $3,818. Adding $300 a month clears it in 63 months and saves $7,581, about half of all the interest the loan would have cost.

Two things are worth noticing. The savings grow faster than the extra amount, because each extra dollar also stops the interest that dollar would have generated in every later month. And the earliest extra payments are the most valuable, because they have the longest time to work.

Neither federal nor private student loans can charge a penalty for paying early; federal law bans prepayment penalties on both.

Make sure the money goes where you intend

Servicers often treat an extra payment as an early payment of next month's bill, marking you "paid ahead" rather than cutting the principal on your most expensive loan. That keeps the interest running on the full balance.

• Tell the servicer how to apply it. Ask, in writing or through the account settings, that any amount above the required payment go to principal, on the loan you choose, and that your account not be advanced to a later due date.
• Target one loan at a time. A federal account is usually several loans with different rates. Direct extra money to the highest-rate loan while paying the minimum on the rest.
• Check the next statement. Confirm the principal on the target loan fell by the extra amount.

Avalanche or snowball across several loans

When you have several loans, you need an order.

• The avalanche sends every extra dollar to the highest-rate loan first, then rolls that loan's payment to the next-highest once it is gone. For a fixed budget it costs the least interest and usually finishes first.
• The snowball sends extra money to the smallest balance first. It usually costs more interest, but clearing whole loans early gives visible wins, and research on real repayment suggests those wins help some people keep going.

For student loans the difference is often small, because federal rates tend to sit close together. It is larger when private or Grad PLUS loans carry much higher rates than the rest. The debt payoff planner runs both orders on your loans, side by side, and shows the date each one is cleared.

Finding the money, and keeping at it

The extra payment has to come from somewhere, and it has to keep coming.

• Send raises to the loan. When pay goes up, raise the extra payment by part of the increase before the money gets absorbed into spending. The lifestyle creep calculator shows how much of a raise usually disappears that way.
• Automate it. A fixed extra amount on the same day as your paycheck is more reliable than whatever is left at the end of the month.
• Use windfalls deliberately. Tax refunds, bonuses and gifts can go to the target loan in one payment.
• Roll freed-up payments forward. When a loan or another debt is cleared, keep paying the same total and send the difference to the next loan.
• Watch the progress. A balance chart or a list of cleared loans keeps the goal concrete. Plan for slips; one missed month of extra payments is a pause, not a failure.

If your income drops, reduce the extra amount first. The required payment protects your credit; the extra is optional. If even the required federal payment becomes hard, switching to an income-driven plan, covered in chapter 2, is usually better than a forbearance that lets interest build.