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# What Is Time-Sharing Agreement in Business Aviation?
- URL: https://www.acmiworld.com/what-is-time-sharing-agreement-in-aviation/
- Published: 2026-09-14T16:35:37.000Z
- Updated: 2026-09-14T16:35:37.000Z
- Description: Time-Sharing Agreement defined for aviation professionals, with its operational or commercial use, document context and related terminology.
- Author: ACMI World
- Tags: Aviation Glossary, Business Aviation & Charter, #Import 2026-09-14 15:41

## Meaning in Professional Aviation

A time-sharing agreement is a U.S. Part 91 cost-sharing structure permitted for qualifying aircraft and parties under specific rules, allowing limited reimbursement for certain flight expenses.

Aviation Glossary

**Term:** Time-Sharing Agreement

**Category:** Business Aviation & Charter

## Where the Term Appears

Time-Sharing Agreement can affect charter agreements, management contracts, jet card terms, operating rules or trip quotations. The buyer should identify which legal entity is the operator and which party is only arranging or administering the service.

## Commercial Effect

It is not unrestricted commercial charter and should be structured carefully around eligible aircraft, parties and reimbursable costs.

## What the Buyer Should Confirm

Confirm the operating rule, contracting entity, aircraft category, taxes, positioning, cancellation rights, substitution provisions and any conditions attached to quoted rates or availability.

## Related Aviation Topics

Related ACMI World coverage includes [international charter planning](https://www.acmiworld.com/international-charter-guide-for-business-flyers/), [vetting charter operators](https://www.acmiworld.com/how-to-vet-charter-operators-before-you-book/), [comparing charter quotes](https://www.acmiworld.com/how-to-compare-charter-quotes-without-missing-costs/), [jet card structures](https://www.acmiworld.com/jet-card-structure-explained/) and [dry lease versus charter](https://www.acmiworld.com/dry-lease-versus-charter-which-model-fits/).

It is not unrestricted commercial charter and should be structured carefully around eligible aircraft, parties and reimbursable costs.

Frequently Asked Questions

## Time-Sharing Agreement FAQ

What does Time-Sharing Agreement mean in aviation?

A time-sharing agreement is a U.S. Part 91 cost-sharing structure permitted for qualifying aircraft and parties under specific rules, allowing limited reimbursement for certain flight expenses.

Why does Time-Sharing Agreement matter?

It is not unrestricted commercial charter and should be structured carefully around eligible aircraft, parties and reimbursable costs.

Where would an aviation professional encounter Time-Sharing Agreement?

It is commonly encountered in business aviation & charter documents, procedures, calculations or operating discussions where the underlying technical or commercial issue is relevant.

Should the term be checked in the charter or program contract?

Yes. Commercial aviation products often use familiar labels with specific program conditions, exclusions and fees that only appear in the contract.