A mortgage acceleration clause is a provision in a mortgage contract that gives the lender the ability to call in the remaining mortgage balance to be paid in full if certain circumstances occur. There are a number of different circumstances that can trigger a mortgage acceleration clause to kick in. For example, default on payments could trigger a mortgage acceleration clause.
Mortgages often contain a very large amount of money. So, suddenly having to repay the full balance of the loan can be quite a challenge. This is especially true if a borrower has only been paying back the loan for a short amount of time. However, mortgage acceleration clauses cut down on the risk for lenders. This is because they know that they can get their money back quickly if something starts to go wrong, or if a sudden change is made. This is why they can be included in mortgage contracts.