Department of Numbers

This section of Department of Numbers is no longer being updated and may be removed in the future. The data here is out of date and should no longer be used.

Idaho Home Affordability

The data below quantifies Idaho home affordability by using home prices and home price indices to calculate price-to-income and price-to-rent ratios.1 The maximum affordable loan amount for the median household income is also calculated. You can also compare Idaho home affordability to other states.

Idaho Home Price-to-Income Ratios

The home price-to-income ratio for Idaho comes from the Federal Housing Finance Agency's relatively new state median price series and their purchase only index combined with Idaho annual median household income data. The FHFA home price series yields a dollar ratio (top chart) while the index results in an index ratio (bottom chart). Based on the latest FHFA state home prices in June 2010, the price-to-income ratio for Idaho was 2.99.

Home Price-to-Income Dollar Ratio: FHFA

Chart of Idaho home price-to-income ratio using FHFA median price

Home Price-to-Income Index Ratio: FHFA

Chart of Idaho home price-to-income ratio using FHFA HPI

Note: Index set to 100 in Q1 of 2000

Idaho Home Price-to-Income Ratio History

(Dollar Ratio)
(Index Ratio)
December 2013 116.0
September 2013 114.9
June 2013 112.5
March 2013 111.2
December 2012 108.3
September 2012 104.7
June 2012 103.5
March 2012 97.7
December 2011 96.0
September 2011 96.9

Idaho Home Price-to-Rent Ratios

The price-to-rent ratio for Idaho is determined for both the FHFA median price and the purchase only index by calculating a ratio with the median contract rent. The price-to-adjusted rent value takes into account CPS reported household size to attempt to correct for quality differences in renter and owner occupied homes. More on that process here. Again, the median price ratio is a dollar ratio and the HPI ratio is an index ratio defined to be 100 in Q1 2000. The adjusted price-to-rent ratio for Idaho was 18.54 in June 2010.

Home Price-to-Rent Dollar Ratio: FHFA, FHFA Adjusted Rent

Chart of Idaho home price-to-rent ratio using FHFA median price

Home Price-to-Rent Index Ratio: FHFA

Chart of Idaho home price-to-rent ratio using FHFA HPI

Note: Index set to 100 in Q1 of 2000

Idaho Home Price-to-Rent Ratio History

(Dollar Ratio)
FHFA Adjusted
(Dollar Ratio)
(Index Ratio)
December 2013 102.6
September 2013 101.6
June 2013 99.5
March 2013 98.4
December 2012 95.8
September 2012 92.6
June 2012 91.6
March 2012 86.4
December 2011 87.3

Idaho Inferred Affordable Mortgage

The inferred affordable mortgage is determined by taking the median household income for Idaho and calculating the mortgage 30% of that income could afford. Traditionally, 30% of income is the maximum amount a homeowner could use towards a home loan. Inferred affordable loan values are calculated from median household income and average monthly mortgage rates. The amounts are not adjusted for inflation.

Inferred Affordable Mortgage

Chart of Idaho maximum affordable home loan amount

Idaho Inferred Affordable Mortgage History

Date Inferred Mortgage
February 2014 $242,091
January 2014 $238,400
December 2013 $237,560
November 2013 $243,244
October 2013 $245,282
September 2013 $236,724
August 2013 $237,560
July 2013 $240,093
June 2013 $248,835
May 2013 $265,476
April 2013 $268,464
March 2013 $264,491
February 2013 $265,806

1. Specifically, Home prices are from the FHFA seasonally adjusted, purchase only quarterly series. Rent data is from the Census ACS and income is from the Census CPS. Rent and income data for the previous year is carried into the following year for calculations prior to release of new data.