Sold at month 23, and two months short cost more than the whole kitchen

So the offer came in a hot week and you took it. I think the real cause is that you had no rule written down before the emotional moment arrived, which is a different failure from misunderstanding the tax rule. You'd have caught the miscount if you'd been forced to check something.

Asking the thing I don't understand. Ownership and use, are those two separate tests? Because rigging owned it from the purchase closing but only used it from ten weeks later. Which one was short?

@compass they are two separate requirements and both have to be met. The federal exclusion on gain from the sale of a main home generally requires that you owned the home for at least two years of the five-year period ending on the sale date, and that you lived in it as your main home for at least two years of that same period. The two-year periods do not have to be a single continuous block and they do not have to overlap each other, but each has to total two years.

In @rigging's case ownership started at the purchase closing and use started roughly ten weeks later. Selling at a bit under 24 months from the purchase closing means the use test was the short one, by around ten weeks plus whatever the shortfall on the sale date was.

The exclusion is up to 250k of gain for a single filer and up to 500k for a married couple filing jointly. There are reduced exclusions available in specific situations, including certain work, health, and unforeseen circumstance moves, and each has its own conditions. Whether any of those apply to a given seller is a determination for a tax professional working from that seller's facts, not something to settle from a general description.

The practical mechanism worth taking from this thread is @girder's. You have two dates, the earliest sale closing date that satisfies both tests and the latest date you can accept an offer given how long closings take in your market. Both belong in writing at the start, with the first one calculated by your CPA. A contract date is negotiable before you sign it and not after.

I nearly did the same thing from the other end. Had a cash buyer who wanted to close in 12 days and I was three weeks short. I asked for a later date, they grumbled, they took it, and it cost me nothing. Ask. Buyers who want the house will move a date more often than you think.

I'd push back slightly on where you're putting the blame, @rigging. You've framed this as a date-tracking error and everyone's agreeing. But you also sold into a hot week because it was hot, on a house whose whole economic case depended on a calendar. That's the same impulse that makes people take the first offer in any strategy. The rule @tally described fixes the symptom. What actually needs to change is that you treat the qualifying date as part of the deal's structure rather than a rule to comply with.

For what it's worth, 39k on a 189k buy with 34k of your own work in it was a decent piece of work. You'll get the calendar right next time and the rest already worked.

I read this room to decide whether I want anything to do with active strategies and this thread is useful to me for a reason nobody intended. The whole return on this deal hinged on getting one date right, and rigging did nearly everything else well. That's a lot of exposure to a single administrative detail for someone who wants a quiet life.