Why did my interest rate change? July 05, 2023 19:41 Updated Follow The APR is based on your creditworthiness. It will vary with the market based on the Prime Rate. Related articles What's the interest rate for SoFi Checking and Savings? What should I do if my home is damaged or destroyed by a natural disaster or other disaster event? $250 Direct Deposit Welcome Offer SoFi Invest Crypto Welcome Promotion What is a promotional APR?