A cottage can be your principal residence
A cottage counts as lived in for a year even if your family is there only a few weeks of it.[1] But only one home per family can be the principal residence in any year, so a family that owns a home and a cottage at the same time must choose, home by home and year by year. The choice is made on the tax return for the year the first of them is sold.[2]
How All the Numbers splits the years
The exempt part of a gain is the gain × (1 + years designated) ÷ years owned, as for any home. A year spent on a home is worth that home's gain ÷ the years it was owned, so All the Numbers gives the shared years to the home with the larger expected gain per year, until it is fully exempt with one year less than it was owned. The one year left over goes to the other home at no cost to the first. The gains are projected at each home's appreciation rate to its sale or the plan's end. For a home you already own whose purchase price the plan did not ask, only the gain from today is known, so it is spread over the years from today, not over every year owned.[3] You can set the number of years the cottage takes instead; the home you live in keeps the rest.
A cottage that also earns rent
A home owned mainly to earn rent is not lived in for this purpose, but incidental rent does not change that.[4] So a rented cottage takes years of the exemption only when you say your family lives there part of each year and the rent is incidental; without that it takes none.[5] See renting out a cottage.
Giving it to a child
A gift, or a sale to a family member below market value, is taxed as a sale at market value. On a sale below market value the child's cost stays the lower price, so the same gain is taxed again when the child sells; a gift gives the child a cost of the market value.[6] All the Numbers therefore offers a gift, taxed as a sale at the cottage's projected value with no selling costs and the mortgage paid from your cash, and does not offer a sale below market value.[7]
Not modelled
- Death, the executor's designation and probate.
- The capital gains reserve on a sale paid over several years.
- Joint ownership with a child, and cottage trusts.
- What the gift costs the child: any land transfer tax and the legal fees are the child's, so the plan, which follows your household's money, leaves them out. If you will pay them, add them as a "One-time cost" in that year.