The year on year share has fallen each month since January 2013, making September the 21st consecutive month of declines, the data from real estate firm Core Logic.
Month on month, the cash sales share ticked up by 1%, however, the firm points out that cash sales share comparisons should be made on a year on year basis due to the seasonal nature of the housing market.
Prior to the housing crisis, the cash sales share of total home sales averaged approximately 25% with a peak in January 2011 when cash transactions made up 46.4% of total home sales.
Real estate owned (REO) sales had the largest cash sales share in September 2014 at 58.1%, followed by re-sales at 34.4%, short sales at 32.4% and newly constructed homes at 16.8%.
While the percentage of REO sales that were cash transactions remained high, REO transactions made up only 7.8% of total sales in September and, therefore, did not have a large influence on the overall cash sales share. In January 2011, when the cash sales share was at its peak, REO sales made up 23.9% of total sales.
A breakdown of the figures shows that Delaware had the largest share of any state at 57.4%, followed by Florida at 50.8%, Alabama at 49.6%, New York at 44.4% and Idaho at 43.3%.
Of the nation's largest 100 Core Based Statistical Areas (CBSAs) measured by population, Miami-Miami Beach-Kendall, Florida, had the highest share of cash sales at 56.2%, followed closely by West Palm Beach-Boca Raton-Delray Beach, also in Florida at 55.9%.
Then came Fort Lauderdale-Pompano Beach-Deerfield Beach, in Florida at 54.8%, Cape Coral-Fort Myers, also in Florida, at 54.7% and Detroit-Dearborn-Livonia, in Michigan at 53.1%.
The data also shows that Washington-Arlington-Alexandria, D.C. had the lowest cash sales share at 16.2%.