The existing loan's classification is permanent: a loan originated as an investment-property loan keeps those terms no matter how you use the property later. Occupancy is set per loan at origination or refinance, based on your intended use at that time. Moving into a property you financed as an investment doesn't re-price the old loan in either direction. The classification simply stays fixed. From there you have options: - Keep the loan. Living in a home while paying the investment-priced loan violates nothing. You just keep the terms you have. - Refinance as a primary residence. Once the home genuinely is your primary residence, a new loan gets underwritten and priced as owner-occupied. You'll need to document that you actually live there at the time of the refinance. - Sell or pay it off, which retires the question entirely. Whether a refinance pencils depends on the rate spread and your equity, so confirm the current occupancy and refinance requirements before you count on the savings.