Debt is any enforceable obligation to pay a defined sum of money to another party. What counts as debt in the legal sense runs well beyond bank loans: it includes credit card balances, mortgages, unpaid taxes, court judgments, child support, co-signed loans, and even money you borrowed from a relative if both sides understood it as a loan. The category a particular obligation falls into decides what a creditor can actually do to collect from you.
What Makes an Obligation Legally Enforceable
The dividing line between a moral IOU and a legal debt is enforceability. A casual promise to a neighbor is a social expectation. A signed promissory note for $5,000 by a specific date is something a judge will make you pay. If a court would compel payment, it’s a debt.
Federal debt collection law defines “debt” as any obligation to pay money that arose from a transaction for personal, family, or household purposes.1GovInfo. 15 USC 1692a – Definitions That specific definition matters because it controls which federal consumer protections apply. Business debts sit outside it and follow different rules.
Two other terms come up often. A liquidated debt is one where the amount is fixed and certain, like a car loan balance. An unliquidated debt is one where the parties disagree on the amount and a court has to decide. A personal injury claim before a verdict is a classic unliquidated debt.
Every debt also has parts. The principal is the original amount borrowed.2Consumer Financial Protection Bureau. On a Mortgage, What’s the Difference Between My Principal and Interest Payment and My Total Monthly Payment Interest is the cost of borrowing. Fees cover things like late payment, origination, and servicing. All three are legally part of the debt, and a creditor can pursue the full amount, not just the principal.
Contractual Consumer Debts
Most of what people owe comes from voluntary agreements. You signed something, received value, and promised to pay it back. That exchange of value is the “consideration” that makes the agreement binding. Before you commit, federal law requires lenders to disclose the annual percentage rate and total finance charges so you can compare offers.3Office of the Law Revision Counsel. 15 USC Chapter 41 Subchapter I – Consumer Credit Cost Disclosure
Consumer debts split along two axes. On structure, revolving debt like a credit card lets you borrow repeatedly up to a limit as long as you make minimum payments. Installment debt like an auto loan or student loan gives you a lump sum upfront and a fixed monthly payment over a set term. On collateral, the split is secured versus unsecured, and this is the one that decides what a creditor can do to you if you stop paying.
Secured Debt
Secured debt is backed by a specific asset called collateral. Mortgages, auto loans, and home equity lines are the common examples. The loan agreement creates a lien on the property, giving the lender the right to seize and sell it if you default. For a home, that means foreclosure. For a car, repossession.
The collateral doesn’t always cover the full balance. If a lender repossesses your car and sells it for less than you owe, you can still be on the hook for the difference. That remaining balance is called a deficiency, and in most states the lender can go to court for a judgment and collect it. Surrendering the asset does not always end the debt.
Unsecured Debt
Unsecured debt rests entirely on your promise to pay. Credit cards, medical bills, and personal loans usually fall here. Because there’s no collateral to fall back on, unsecured debts tend to carry higher interest rates. If you default, the creditor’s main remedy is to sue, win a judgment, and then use enforcement tools like wage garnishment or bank levies.
Acceleration Clauses
Many loan contracts let the lender demand the entire remaining balance at once if you breach the agreement, typically by missing payments. When a lender invokes acceleration, you owe the full unpaid principal plus interest already accumulated, not future interest that would have accrued over the rest of the loan. A single missed mortgage payment can technically trigger this, though lenders usually work through other options first.
Debts Created by Law or Court Order
Not every debt starts with a signature on a contract. Some are imposed on you by statute or by a judge, and these categories typically come with stronger collection tools than ordinary consumer debt.
Tax Debts
Tax liabilities come directly from the Internal Revenue Code and equivalent state laws. The IRS doesn’t have to sue you first. Once you fail to pay after a demand, a federal tax lien automatically attaches to everything you own, including real estate, vehicles, and financial accounts.4Office of the Law Revision Counsel. 26 USC 6321 – Lien for Taxes Beyond the lien, the IRS can levy bank accounts and garnish wages without a court order.
The failure-to-pay penalty runs at 0.5% of the unpaid balance per month, capped at 25% of the tax owed, plus daily interest. Tax debts survive bankruptcy in most situations, and if you never filed a return, there’s no statute of limitations on collection.
Child Support and Alimony
Court-ordered domestic support is among the most aggressively enforced obligations in the legal system. The order can’t be renegotiated privately; changes have to go through the court. Falling behind isn’t just a debt problem — a judge can hold you in contempt, which carries potential jail time. Wage garnishment for child support reaches up to 50% to 65% of disposable earnings depending on your circumstances, well above the cap for ordinary debt.
Civil Judgments
When someone sues you and wins, the court enters a judgment that converts the legal claim into an enforceable debt. You become a “judgment debtor,” and the winner can pursue garnishment, bank levies, and property liens. Federal law caps garnishment for ordinary judgments at 25% of your disposable earnings, or the amount by which weekly earnings exceed 30 times the federal minimum wage, whichever produces the smaller garnishment.5Office of the Law Revision Counsel. 15 USC 1673 – Restriction on Garnishment Some states offer stronger protection, and a few prohibit wage garnishment for consumer debt altogether.
Federal Student Loans
Federal student loans sit in their own category. The government can garnish up to 15% of disposable pay through an administrative process without a court order. It can also intercept tax refunds and offset a portion of Social Security benefits. A federal loan enters default after roughly 270 days of missed payments, though the Department of Education has periodically paused involuntary collections in recent years. Unlike most consumer debts, federal student loans have no statute of limitations on collection.
Government Fines and Penalties
Unpaid traffic tickets, municipal fines, and regulatory penalties are debts too. If you don’t pay within the time the court sets, the government can convert the fine into a civil judgment and collect the same way any other creditor would. In some jurisdictions, unpaid fines can be taken from state tax refunds.
Informal Loans and Co-Signed Debts
Money borrowed from friends or family is a legal debt if there’s evidence both parties intended repayment. No formal loan agreement is required. Text messages, emails, a handwritten IOU, or a consistent pattern of partial payments can all establish that the money was a loan and not a gift. Courts examine both parties’ behavior, and the person claiming it was a loan carries the burden of proof.
Co-signing creates what lawyers call a contingent liability. You agree to repay the full balance if the primary borrower stops paying.6Consumer Financial Protection Bureau. Should I Agree To Co-Sign Someone Else’s Car Loan? The creditor can come after you without first trying to collect from the primary borrower, and any default hits your credit record as hard as theirs.7Federal Trade Commission. Cosigning a Loan FAQs
Federal law requires lenders to give every co-signer a written notice explaining these risks before liability attaches.8eCFR. 16 CFR Part 444 – Credit Practices The notice has to say that you may owe the full amount including late fees and collection costs, and that the creditor can use the same tools against you it would use against the borrower. Co-signing is often treated as a formality. It isn’t. You’re taking on a real debt that stays dormant only as long as someone else keeps paying.
How Long a Debt Stays Collectible
Every state sets a statute of limitations for how long a creditor has to sue on a debt. For written contracts, the range runs from 3 to 15 years depending on the state, with 6 years common. Once that window closes, the debt is “time-barred,” and a collector cannot sue you or threaten to sue you to collect it.9Consumer Financial Protection Bureau. 1006.26 Collection of Time-Barred Debts
A time-barred debt doesn’t disappear. You still technically owe it, and a collector can still ask you to pay. What changes is enforcement leverage. Watch out here: in many states, making a partial payment or acknowledging the debt in writing can restart the clock and give the creditor a fresh window to sue.
On the collector’s side of the fence, the Fair Debt Collection Practices Act limits how third-party collectors can pursue you, including a cap of seven calls within seven consecutive days about a particular debt.10eCFR. 12 CFR Part 1006 – Debt Collection Practices (Regulation F) Those rules apply to collectors working on behalf of someone else, not to the original creditor.
Which Debts Survive Bankruptcy
Bankruptcy is the legal process for discharging debts you can’t pay. Chapter 7 wipes out most unsecured debts in a few months through liquidation of non-exempt assets. Chapter 13 sets up a court-supervised repayment plan lasting three to five years, after which eligible remaining balances are discharged. Some categories of debt survive both.
Federal law lists debts that generally cannot be discharged:11Office of the Law Revision Counsel. 11 USC 523 – Exceptions to Discharge
- Most tax debts, including recent income taxes, taxes where no return was filed, and taxes involving fraud.
- Child support and alimony, which are completely exempt from discharge.
- Federal and private student loans, unless you can prove “undue hardship,” a standard courts have historically read narrowly.
- Debts obtained through fraud or false pretenses, including credit card charges over $500 for luxury goods made within 90 days of filing.
- Debts arising from willful injury to a person or property.
- Criminal fines and restitution.
The category matters before you file, not just after. If most of what you owe is on this list, bankruptcy may offer limited relief while still leaving marks on your credit for years. Whether something counts as debt is only the first question. What kind of debt it is decides everything that happens next.