Dirty Price

What is Dirty Price?

The dirty price of a bond is the price that includes accrued interest since the last coupon payment. It is the actual price paid by the buyer.

Example of Dirty Price

A bond with a clean price of $1,000 and $50 of accrued interest has a dirty price of $1,050.

How To Calculate Dirty Price

Dirty Price = Clean Price + Accrued Interest

  • Special Tip: Always consider the dirty price when buying or selling bonds to understand the total amount paid or received. 

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  • Advantages 
    • Provides a more accurate reflection of the bond’s cost. 
    • Includes all interest accrued, giving a clearer financial picture. 
  • Disadvantages 
    • Can be confusing compared to the clean price. 
    • Requires calculation of accrued interest.


What is the difference between dirty price and clean price?

The clean price excludes accrued interest, while the dirty price includes it.

Because it includes accrued interest, making it less “clean” or straightforward.

Accrued interest increases the dirty price.

Yes, it is applicable to all bonds with periodic interest payments.


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