factors that affect interest rates How Interest Rates Affect Your Small Business | QuickBooks – As a business owner, understanding interest rates is crucial to. Along with the federal fund rate, individual factors can also affect interest rates.30 yr fixed mortgage rates fha 30 Year Fixed FHA Mortgage Rates – realtor.com – Nationally, 30 Year Fixed FHA Mortgage Rates are 4.30%. This rate was 4.37% yesterday and 4.41% last week. 30 Year Fixed fha mortgage rates today. thursday, March 21. Rate Change (1 day).