BriefLoft field guide

How long should a proposal remain valid?

Choose an expiration window that protects pricing and scheduling without manufacturing urgency.

Published by BriefLoft · Reviewed August 31, 2026 · Editorial methodology

Create a proposal with clear timing

Match validity to volatility

A validity period protects assumptions about pricing, availability, subcontractors, and third-party costs. Thirty days is common for ordinary service work, but fast-moving schedules or supplier quotes may require a shorter period.

Explain what expiration means

Expiration should not be a threat. State that the scope, fee, and start window may need to be reconfirmed after the date. This preserves the relationship while avoiding an open-ended commitment.

  • Use a specific calendar date.
  • Tie any held start date to deposit or signature.
  • Requote third-party costs when required.
  • Issue a revised version if the proposal reopens.

Do not create false scarcity

Only mention limited availability when it is true. A credible deadline is linked to real capacity, dependencies, or pricing assumptions—not pressure for its own sake.

Common questions

Is 14 days too short?

Not when availability or supplier pricing genuinely changes quickly, but explain the reason and allow the client enough review time.

Can I extend an expired proposal?

Yes. Confirm that scope, price, and schedule still work, then issue an updated proposal or written extension.

How long should a proposal remain valid? · BriefLoft