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An ordinary annuity makes payments at the end of each period. The payment is calculated using the formula: PMT = PV × r(1+r)^n / ((1+r)^n − 1), where r is the periodic interest rate and n is the total number of periods.
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What is an ordinary annuity?
An ordinary annuity makes payments at the end of each period (e.g., end of month). This differs from an annuity-due, which makes payments at the beginning of each period.
How does payment frequency affect the amount?
More frequent payments (monthly vs. annually) result in a lower amount per payment but the same total value over time, assuming the same interest rate applies proportionally.
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