Selling a House, Carrying a Note

[Katharine Valentino]

If I sell a house and carry the note, I understand that the capital-gain percentage applicable to the sales date will apply to the down payment.  After that, as the buyer pays each month for succeeding years, will the capital-gain percentage stay the same--that is, based on the year of the sale--or will it change each time a new percentage is set by new tax law?