30 Year Fixed
A 30 year fixed conventional loan is a loan that has the same mortgage   payments for 360 months. Conventional loans typically are harder to   qualify for than 
FHA loans and require a slightly higher down payment. However, in some cases   rates can be  lower and have lower closing costs. Also, monthly mortgage   insurance is usually less or can be nothing with 20% down payment.
  	
    

 5% down payment required on purchase
    

 Minimum credit score - usually 620
   

 Post- bankruptcy: can qualify after 4 years
    

 Post-foreclosure: can qualify after 7 years
    

 Post-shortsale: Can Qualify after 2 years (LTV restrictions may apply)
  	
  	
20 Year Fixed
This type of loan is the same as the 30 year fixed rate loan except the     life of the loan is 240 months as opposed to 360 months. Since the   loan   is being paid slightly faster than the 30 year fixed rate loan,   monthly   payments for this type loan are higher than the 30 year fixed   rate loan.   Some Lenders allow for a lessor rate. 
15 Year Fixed
This type of loan is the same as the 30 year fixed rate loan except the     life of the loan is 180 months as opposed to 360 months. Since the   loan   is being paid faster than either the 30 year fixed rate loan or   the 20   year fixed rate loan, monthly payments for this type loan are   higher   than the other two loans.   Generally, the longer a lender agrees to keep the interest rate "fixed",        the greater the risk to the lender, therefore, in most instances,   interest      rates on 15 year fixed rate loans are slightly lower than   on 20 or 30 year      fixed rate loans.