If you miss a federal student loan payment, it doesn’t instantly ruin your credit. But after 270 days, it becomes default. That’s the line where your loan stops being a manageable bill and becomes a financial emergency. Default hits your credit report like a wrecking ball. It stays there for seven years. It can drop your score by 100 points or more, depending on where you started. That can mean higher car loan rates, rejected apartment applications, bigger insurance premiums, and even trouble getting a phone plan. The message is simple: default is expensive.

Before default, late payments show up too. A payment 30 days late can be reported. At 60 and 90 days, the damage grows. Your payment history is the biggest factor in your credit scores, so every on-time payment is a small vote for future you. Every missed payment is a vote against. If you’re struggling, don’t ghost your servicer. Call them. Ask about income-driven repayment, deferment, or forbearance. For federal loans, there’s almost always a stopgap. You have to use it before 270 days pass.

Student loans also affect your credit mix and account age. Credit mix is the variety of accounts you have, like credit cards, auto loans, and installment loans. A student loan adds to that mix, which can help if you have little else. Account age is how long your accounts have been open. Student loans can stay on your report for years, even after you pay them off, so they may help your average age. But those benefits are small compared with payment history. One default outweighs years of good behavior. That’s why staying current matters more than chasing a perfect mix.

Default also triggers collection costs. Your loan balance can grow by hundreds or thousands. The government can garnish your wages, seize tax refunds, and offset Social Security benefits. It can take money without asking a judge. Private student loans work differently, but the result is similar: collections, lawsuits, and a credit report scar. If you have private loans, call the lender early. They may offer temporary hardship plans, interest-only payments, or refinancing options. They are less flexible than federal loans, but silence is worse.

The good news is that default isn’t permanent. You can rehab a federal student loan. Rehabilitation usually means making nine voluntary, reasonable and affordable payments in ten months. After that, the default notation is removed from your credit report. The late payments from before default can remain, but removing the default itself helps. You can also consolidate out of default, but that doesn’t erase the default record. It just gets you back into repayment. Rehabilitation is often better for credit, while consolidation can be faster. Ask your servicer or the U.S. Department of Education which path fits your situation.

Once you’re out of default, protect your credit like it’s a prized possession. Set up auto-pay so you never miss a due date. Recertify your income-driven repayment plan every year. If your income drops, update it immediately. If you can’t afford the new amount, ask for a recalculation. A lower payment that’s on time beats a higher payment that’s late. Also check your credit reports for errors. Student loans are often split among servicers, and mistakes happen. Dispute anything wrong. You can get free credit reports from the official source. This is not about being obsessed with a three-digit number. It’s about keeping doors open for apartments, cars, mortgages, and jobs that check credit.

Deferment and forbearance can also affect your credit, but usually not negatively if you’re current. They pause payments, and the loan is reported as current. But interest still accrues on many loans. That means your balance grows, and when you restart, your payment may be higher. If you use forbearance to avoid default, that’s a win. If you use it for years while interest stacks up, that’s a slow leak. Use it as a bridge, not a lifestyle.

Remember, your credit score is a story of how you handle borrowed money. Student loans are a big chapter. You can’t change the past, but you can change the next payment. If you’re current, keep it that way. If you’re late, catch up. If you’re in default, start rehab. The sooner you act, the less it costs. No shame, no panic, just a plan. Your future landlord, lender, and boss don’t need to see a perfect past. They need to see that you handle today. Make today’s payment on time. Then do it again next month.