Every debt you will ever have falls into one of two categories, and the category explains almost everything else about it: the interest rate, what happens if you stop paying, and where it should sit in your payoff order.
Secured debt
Backed by a specific asset the lender can take if you stop paying. A mortgage is secured by the house. An auto loan is secured by the car. A secured credit card is backed by your deposit.
Because the lender has a fallback, they take less risk, so rates are lower and approval is easier. The trade is that non-payment has an immediate, physical consequence: foreclosure or repossession.
Unsecured debt
Backed by nothing but your promise to repay. Credit cards, most personal loans, medical bills, and federal student loans.
The lender's only recourse is collection activity and, eventually, a lawsuit. That greater risk is priced in, which is why credit cards sit near 25% while a mortgage sits near 7%.
Federal student loans are the strange case. They are unsecured, so there is nothing to repossess, but they carry collection powers no other unsecured debt has: administrative wage garnishment and tax refund seizure without a court order. They also survive bankruptcy in nearly all circumstances.
What this means for your payoff order
Two competing rules, and you need both.
Normally, pay by rate. Attack the highest APR first, which is almost always unsecured debt. It costs the most to keep.
When money is genuinely tight, pay secured first. Missing a card payment damages your credit. Missing a car payment can cost you the car and therefore your route to work. Keep the roof and the wheels before optimising interest.
Do not convert unsecured into secured casually
Using a home equity loan to clear credit card debt lowers your rate, and it also turns a debt that could never take your house into one that can. That is a real trade, not a free saving. It can still be the right call, but it should be a decision rather than a technicality nobody explained.
The short version
- Secured debt has collateral, so lower rates and repossession risk.
- Unsecured has none, so higher rates and collection or lawsuit risk.
- Pay by interest rate normally. Pay secured first in a genuine crisis.
- Turning card debt into home-backed debt puts your house on the line.
Common questions
Which should I pay off first, secured or unsecured debt?
Normally the highest interest rate first, which is usually unsecured. In a genuine cash crisis, prioritise secured debts so you do not lose your home or car.
Are student loans secured or unsecured?
Unsecured, but federal student loans carry unusual collection powers including wage garnishment without a court order, and they are rarely dischargeable in bankruptcy.
Why are credit cards so much more expensive than mortgages?
Because nothing backs them. If you stop paying a mortgage the lender takes the house. If you stop paying a card they have only collection activity, and that risk is priced into the rate.