The findings indicate that continued confusion means many people have been disappointed since the introduction of the new rules with a quarter claiming that the MMR has impacted their ability to buy a property.
A third reported that the changes have made them feel less in control of securing a mortgage.
In a study conducted by Experian in April 2014, just 44% of those surveyed were aware that the MMR would mean that lenders would be more careful about ensuring mortgage applicants could afford their repayments.
One year on 62% were not aware that lenders may require bigger deposits with 23% believing they could apply for mortgages with smaller deposits than before.
Some 37% didn’t recognise that lenders would now be more careful on whether they could afford repayments and 15% mistakenly believed that lenders have now relaxed their lending criteria as a result of the MMR.
Paul Russell, director of analytics for Experian’s decision analytics, said: “One in ten of those who were unsuccessful with their mortgage application does not know why or hasn’t asked their lender, leaving them at a significant disadvantage when it comes to improving their chances of being accepted in the future.
“Lenders are clearly trying to make sure that any decision to lend does not cause a person to fall into unmanageable debt. However, there is more that the industry can do by helping those individuals who didn’t qualify to understand why and by offering advice on how they might be able to turn things around.”