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COUPDAYBS(Settlement, Maturity, Frequency, Basis)

  • Where is the security's settlement date (a date when coupon or a bond is purchased),
  • is the security's maturity date (a date when coupon or a bond expires),
  • is the number of coupon payments per year, and
  • is the type of day count basis to use.
    • COUPDAYBS(), returns the number of days from the beginning of the coupon period to the settlement date.


COUPDAYBS(Settlement, Maturity, Frequency, Basis)

  • and dates should be entered either in 'date format' or 'dates returned using formulas'. If dates are not valid, Calci displays #N/A error message.
  • If date = date, Calci displays #N/A error message.
  • The values for should be 1,2 or 4.

For Annual payment, frequency = 1,

For Semi-annual payment, frequency = 2,

For Quarterly payment, frequency = 4.

  • value is optional. If omitted, Calci assumes it to be 0.

Below table shows the use of values:

Basis Description
0 US (NASD) 30/360
1 Actual/actual
2 Actual/360
3 Actual/365
4 European 30/360
  • If value is other than 0 to 4, Calci displays #N/A error message.


Consider the following example that shows the use of COUPDAYBS function:

=COUPDAYBS(A1,A2,A3,A4) displays 41 as a result.
=COUPDAYBS(DATE(2008,6,1),DATE(2009,11,1),2,1) displays 31 as a result.

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