After a commitment exists. Full stop. The Manufacturer's Rebate close is the system's documented incentive vehicle, and its power comes from its position: it brings the overall investment down for a homeowner who has already decided — it rewards and completes a decision instead of trying to purchase one.
The short answer
The system's rule is absolute: no discount, rebate, or incentive is presented before a commitment or takeaway step. The reasons are mechanical, not moral. An incentive offered to an uncommitted homeowner attaches to nothing — there's no decision for it to complete, so it simply resets the expectation and invites the next objection at the lower figure. The same rebate, offered after the commitment, lands as the company going the extra step for a customer — because that's literally what's happening.
How it runs
The close's documented phrasing — bringing the overall investment down — is deliberate: the rebate is framed as a reduction of a real, established figure, which is why the full presentation and isolation had to happen first. A rebate mentioned at the door, in the warm-up, or as a rescue during the framework isn't an early close; it's the destruction of the close's only asset, which is its position in the sequence. Timing isn't a detail of this close. Timing is the close.
Spar's rounds and the 33-objection library grade your framework under pressure — Round 1 is free; the full camp is $29/month. Spar before you knock.