Installment Agreement

An Installment Agreement in the United States sets out the rights, duties and consideration binding the parties to it.

Installment Agreements are used across a broad spectrum of financial transactions. The Internal Revenue Service (IRS) offers installment agreements under Internal Revenue Code § 6159 to taxpayers unable to pay their full tax liability by the return due date — the IRS's Online Payment Agreement Tool at irs.gov allows eligible taxpayers to establish agreements without speaking to an IRS representative. State tax agencies including the California Franchise Tax Board, New York State Department of Taxation and Finance, and Texas Comptroller of Public Accounts offer similar installment payment plans for state tax debt.

Between private parties, Installment Agreements are used when a business extends credit to a customer who will pay in monthly installments, when two parties settle a contract dispute and agree on a structured payout over time, when a vehicle seller or equipment lessor finances the purchase price, and when a landlord agrees to accept overdue rent in installments to avoid eviction proceedings. Consumer installment credit — including auto loans, personal loans, and buy-now-pay-later agreements — is regulated by the federal Truth in Lending Act (TILA), 15 U.S.C. § 1601 et seq., and Regulation Z (12 C.F.R. Part 1026), which require disclosure of the Annual Percentage Rate (APR), finance charges, total of payments, and payment schedule before the consumer is bound.

Usury laws in each state cap the maximum interest rate that can lawfully be charged. States such as Delaware and South Dakota have minimal usury restrictions for commercial lenders, while New York sets a 16% civil usury cap (General Obligations Law § 5-501) for loans to individuals below $250,000, with criminal usury at 25%.

An Installment Agreement in the United States is needed whenever a creditor and debtor agree that an outstanding financial obligation will be repaid over time in regular installments rather than immediately in full, and both parties require a written record of the repayment terms.

Small business owners who have extended credit to customers for goods or services — including contractors, suppliers, and professional service firms — use Installment Agreements to document the repayment terms when a customer cannot pay the full invoice balance immediately. Without a written agreement, the creditor has no documented acceleration clause, no agreed interest rate, and no formal default mechanism — reducing leverage if the customer stops paying.

Individuals who have loaned money to friends, family members, or business associates benefit from an Installment Agreement that documents the total amount owed, the repayment schedule, the applicable interest rate, and the consequences of missed payments. Courts in California, New York, Texas, and Florida have consistently enforced written installment agreements in small claims and civil court proceedings, while oral agreements for repayment are difficult to prove and enforce.

Parties settling a contract dispute, property damage claim, or personal injury matter outside of court frequently use an Installment Agreement as part of the settlement documentation. The settlement amount is agreed, and the Installment Agreement formalises how the obligor will pay the agreed sum over the agreed period, with an acceleration clause providing that the full unpaid balance becomes immediately due if any installment is missed.

Employers who have advanced salary, provided company loans to employees, or paid relocation expenses that are subject to clawback if the employee leaves within a specified period use Installment Agreements — or incorporate installment repayment terms into employment agreements — to document the repayment obligation and deduction authorisation.

IRS Form 9465 (Installment Agreement Request) is used by individual taxpayers to request a monthly payment plan for unpaid federal income tax. State tax agencies across all 50 states have equivalent installment payment plan programs for state income tax, sales tax, and payroll tax liabilities.

A legally enforceable US Installment Agreement must contain the following essential provisions to clearly define the parties' obligations, protect the creditor's rights upon default, and comply with applicable federal and state law.

The parties must be identified with full legal names and addresses. For business creditors, the entity type (LLC, corporation, partnership) and state of formation should be stated. The total amount owed must be specified in US dollars — both in figures and in words — as the sum that forms the basis of the repayment schedule.

The payment schedule must specify: the amount of each installment payment; the frequency of payments (weekly, bi-weekly, monthly); the due date of the first payment; the due date of each subsequent payment; and the total number of payments. An amortization table showing the balance remaining after each payment is advisable for longer-term agreements where interest accrues on the outstanding balance.

The interest rate clause must state the applicable annual interest rate as a percentage and specify whether interest accrues on the original principal balance (simple interest) or on the outstanding unpaid balance (compound interest). The agreement must confirm that the stated rate complies with the usury laws of the governing state. For consumer credit agreements covered by the Truth in Lending Act (15 U.S.C. § 1601), the agreement must disclose the Annual Percentage Rate (APR), the finance charge in dollars, the amount financed, and the total of all scheduled payments.

The late payment fee clause must specify any fee chargeable if a payment is not received by its due date (or within a stated grace period of typically 5 to 15 days). The fee must not violate state consumer protection laws, which in many states cap late fees on consumer debts.

The acceleration clause is critical: it must state that if the debtor fails to make any scheduled payment within the grace period, the entire outstanding balance — all remaining installments — becomes immediately due and payable at the creditor's option, without further notice. Without an acceleration clause, the creditor can only sue for each missed installment as it falls due.

The default and remedies clause must define what constitutes a default (missed payment, insolvency, breach of any covenant), specify any required notice period before the creditor exercises remedies, and list the available remedies — acceleration, collection action, reporting to credit bureaus (Equifax, Experian, TransUnion), and repossession of any pledged collateral.

The governing law clause must specify the state whose law governs the agreement. Both parties' signatures with dates are required for a binding written contract under the Statute of Frauds applicable in each state.