Understanding Single Monthly Mortality Rate (SMM) in Mortgage Loans

Q: How is SMM calculated?

SMM is calculated by dividing the amount of unscheduled prepayments made during the month by the scheduled balance at the end of that month.

Q: Does SMM apply to all mortgage loans?

Yes, SMM is relevant for all mortgage loans that allow for prepayments.

Definition & Meaning

The Single Monthly Mortality Rate (SMM) is a metric used in the mortgage industry to measure the percentage of principal paid off in a mortgage loan within a single month. It reflects the extra principal reduction beyond the scheduled monthly payment. The SMM is calculated as a percentage of the principal balance at the start of the month, specifically by dividing the unscheduled prepayments made during the month by the scheduled balance at the end of that month.

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Legal Use & context

The SMM is primarily used in the context of mortgage-backed securities and loan servicing. It is important for lenders, investors, and servicers to understand SMM as it impacts the cash flow and valuation of mortgage portfolios. Users can find legal forms related to mortgages and loan agreements through platforms like US Legal Forms, which provide templates that can help manage these financial instruments effectively.

Key legal elements

Real-world examples

Here are a couple of examples of abatement:

For instance, if a mortgage has a principal balance of $200,000 at the beginning of the month and the scheduled principal payment is $1,500, but the borrower makes an additional unscheduled payment of $3,000, the SMM would be calculated based on these figures.

(hypothetical example)

Comparison with related terms

Term	Definition
Monthly Payment	The fixed amount paid each month towards the mortgage, including principal and interest.
Prepayment Penalty	A fee charged to a borrower for paying off a loan early, which can affect the SMM calculation.

Common misunderstandings

What to do if this term applies to you

If you are a borrower or investor dealing with mortgages, understanding SMM can help you make informed financial decisions. If you are considering making unscheduled payments, review your mortgage terms to ensure there are no prepayment penalties. For assistance, you can explore ready-to-use legal form templates on US Legal Forms, which can help you manage your mortgage agreements effectively. If your situation is complex, consulting a legal professional is advisable.

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Quick facts

Typical calculation: Unschedulded prepayments / Scheduled balance at the end of the month.
Importance: Affects cash flow and valuation of mortgage-backed securities.
Relevance: Applies to all types of mortgage loans.