What is debt? Types, how it works and how much is too much

The short answer: debt is money you borrow and agree to pay back later, usually with interest.

• Example: a $20,000 car loan at 7% APR for 60 months is about $396 a month
• Types: secured vs. unsecured and revolving vs. installment
• Good debt vs. bad debt and how much is too much
• Get control: list every debt and pick a payoff method
• Next step: Plan it with the Debt Payoff Planner ($6.99).

What is debt? Debt is money you borrow and agree to pay back later, usually with interest. When you swipe a credit card, finance a car or take out a mortgage, someone else pays now and you promise to repay them over time. Almost every household carries some debt. The Federal Reserve's G.19 consumer credit report put total US consumer credit at about $5.2 trillion in August 2026, and that figure does not even include mortgages. Below you will find the main types of debt, how interest works, what good and bad debt mean, how much is too much, and how to take control of what you owe.

How debt works

Every debt has a few basic parts.

On an installment loan, early payments are mostly interest, and more goes to principal over time. On a credit card, interest is charged on any balance you carry past the due date.

Types of debt

Debt is usually described in two ways: whether it is secured, and whether it is revolving or installment.

Unsecured debt usually carries higher interest rates because the lender has less protection. Revolving debt, especially credit cards, is the easiest to grow without noticing because there is no fixed end date.

Common kinds of household debt

• Mortgage: usually the largest debt, repaid over 15 to 30 years.
• Auto loan: secured by the car, often 36 to 72 months.
• Student loans: federal or private, with different repayment options.
• Credit cards: revolving, often with the highest rates.
• Personal loans: fixed-term unsecured loans, often used to consolidate other debt. Our guide to debt consolidation explains when that saves money.
• Medical debt: bills from doctors or hospitals, sometimes sent to collections.
• Buy now, pay later: short installment plans at checkout.
• Tax debt: money owed to the IRS or your state.

Good debt vs. bad debt

There is no official definition, but this is how the terms are usually used.

Even good debt can become a problem if the payments are too large for your budget. The question is always: can you afford the payment, and is the cost worth what you get?

How much debt is too much?

Lenders look at your debt-to-income ratio, or DTI: your total monthly debt payments divided by your gross monthly income. The CFPB's DTI explainer uses an example of $2,000 in monthly debt payments on $6,000 of gross income, a DTI of 33%. A lower DTI makes it easier to qualify for new credit at better rates.

Other warning signs that debt is getting too heavy:

• You can only make minimum payments.
• Your balances go up even though you are paying.
• You use credit cards to cover groceries, rent or other bills.
• You do not know exactly how much you owe.
• You are missing payments or getting calls from collectors.

What happens when debt goes unpaid

Missed payments usually bring late fees and can raise your interest rate. Once a payment is 30 days late, the lender may report it to the credit bureaus. After several months, the account may be charged off and sold or sent to a collector. For secured debt, the lender can take the collateral. Some creditors sue to collect.

Your credit report records these events. The CFPB's credit reports and scores guide explains how to get your free reports and dispute errors. Checking your reports at least once a year is a good way to see every debt listed under your name.

How to get control of your debt

Ready for the full plan? Our guide to getting debt free includes a payoff example, a debt-to-income check and tips for staying that way.

1. List every debt. Include the lender, balance, APR, minimum payment and due date.
2. Pull your credit reports to catch anything you missed.
3. Make a budget that covers essentials and every minimum payment.
4. Pick a payoff method. The avalanche pays the highest APR first and saves the most interest. The snowball pays the smallest balance first for quick wins.
5. Put every extra dollar toward one target debt while paying minimums on the rest.
6. Stop adding new balances while you pay down existing ones.
7. Build a small emergency fund so a surprise bill does not go on a credit card.
8. Ask for help early. Call your lender about hardship options, or contact a nonprofit credit counselor.

What debt really costs: a credit card example

Interest is why the same balance can cost very different amounts depending on how fast you pay it. Here is a $5,000 credit card balance at 24% APR, with no new charges, paid with a fixed monthly payment.

Our guide on how long to pay off credit card debt has full payoff tables by balance and monthly payment.

Raising the payment from $150 to $250 cuts the payoff time by more than half and saves almost $1,900 in interest. That is the core idea behind every payoff plan: the faster the principal goes down, the less interest you pay. These figures are estimates using monthly compounding; your card's actual math may differ slightly.

Where to get help with debt

You do not have to sort it out alone. Good places to start:

• Your lender. Many offer hardship programs, lower payments or a pause if you call before you fall behind.
• A nonprofit credit counselor. Look for agencies that offer free or low-cost budget reviews and explain your options.
• Your employer or credit union. Some offer financial wellness programs or small low-rate loans.
• Legal aid. If you are being sued or a collector is not following the rules, a legal aid office or consumer lawyer can help.

Be wary of any company that asks for large upfront fees or promises to make debt disappear.

See all your debt in one place

The Debt Payoff Planner ($6.99) is an Excel and Google Sheets spreadsheet with four tabs. Enter each debt's balance, APR and minimum payment, choose snowball or avalanche, and it shows your payoff order, a month-by-month payoff plan, your debt-free date and the interest you save, with a log for each payment you make.

For a step-by-step plan, read how to get out of debt and compare the debt snowball vs. avalanche. Check your ratio with our guide on how to calculate debt-to-income ratio, see where you stand against average credit card debt, and try the free debt payoff calculator.