Uniform Series Sinking Fund (USSF)

The Uniform Series Sinking Fund (USSF) factor calculator computes the USSF based on the interest rate per period and the number of periods.

INSTRUCTIONS: Enter the following:

• (i) Interest Rate
• (n) Number of Periods

Uniform Series Sinking Fund factor (USSF): The calculator returns the factor as a real number.

The Math / Science

The formula for the Uniform Series Sinking Fund (USSF) factor is:

    `USSF = i / ( (1+i)^n -1)`

where:

• USSF is the Uniform Series Sinking Fund factor
• i is the interest rate per period
• n is the number of periods (e.g. cash flow periods)

The USSF is a Discrete Compounding Discount Factor. Often, a sinking fund is created by an organization through saving money over a period of time to fund a future capital expense or repay a long-term debt.

NOTES

This equation calculate the discount factor used to calculate annualized cash flow from a future worth.  

This is the constant periodic amount, at a constant interest rate that must be deposited to accumulate a future value.

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Present and Future Worth Calculators

• (SPCA) Single Payment Compound Amount Factor
• (USSF) Uniform Series Sinking Fund Factor 
• (SPPW) Single Payment Present Worth Factor
• (UGFW) Uniform Gradient Future Worth Factor 
• (UGPW) Uniform Gradient Present Worth Factor 
• (UGUS) Uniform Gradient Uniform Series Factor 
• (USCA) Uniform Series Compound Amount Factor 
• (USPW) Uniform Series Present Worth Factor 

REFERENCE

• Lindeburg, Michael R (1992). Engineer In Training Reference Manual. Professional Publication, Inc. 8th Edition.