Substantial Performance

In one sentence

Completing most of a contract obligation in good faith, even if not perfectly.

Plain English

Substantial performance means a party has done most of what the contract requires, in good faith, even if minor details are missing or imperfect. When substantial performance occurs, the performing party can still demand payment but the other party can deduct damages for the incomplete or imperfect parts. This doctrine prevents unfair forfeiture when someone has done nearly everything promised.

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Example

A contractor builds a house exactly to specifications except for three small cosmetic issues: a door handle is slightly loose, one light fixture is a different shade of brass than specified, and a baseboard has a tiny gap. The contractor has substantially performed. The homeowner must pay the contract price but can deduct a small amount for the cost of fixing these minor issues.

Used in a sentence

“The court found substantial performance and ordered payment minus a deduction for the incomplete landscaping.”

Related terms

Material Breach

A significant failure to perform a contract obligation that defeats its core purpose.

Minor Breach

A small or technical failure to perform that doesn't defeat the contract's main purpose.

Condition Precedent

An event that must happen before a party's obligation to perform becomes due.

Implied Covenant of Good Faith and Fair Dealing

An unwritten promise in every contract that parties will act honestly and fairly toward each other.

Damages Calculation

The process of determining how much money a harmed party should receive for a breach.

Offer

A proposal to enter into a binding agreement on specific terms.

Acceptance

Agreeing to the exact terms of an offer, creating a binding contract.

Consideration

Something of value exchanged by each party to make a contract binding.

This page is a plain-English reference and is not legal advice. Laws vary by jurisdiction and change over time. For specific situations consult a licensed attorney.