Primary Home convert to Investment property Capital gain tax

[Kevin Kim]

I own my primary home for 3yrs and will plan to buy new primary home and keep this current home as rental.

My plan is buy new primary home and keep this current home as rental.- In this case, when I sell my current home (will be rental in the future) how is calculated the capital gain tax? Currently the price gone up about (capital gain as of now, $200,000) and it is still below $500,000. Let's say, I convert the home to rental Feb 2022 then sell home 2027 (total capital gain is 500,000 for example when I sell 2027). When I sell 2027, Should I pay capital gain tax for entire 500,000 or pay partial capital gain tax (500,000 - 200,000= 300,000) for only when the home is being used rental (2022 Feb - 2027)