Finance & Irish taxes · Calculator companion · By K Imports
Fixed-coupon bond valuation: practical guide
This guide explains how to use the Count.ie fixed-coupon bond valuation. Value a plain fixed-coupon bond and measure interest-rate sensitivity. Follow the inputs, method and worked example below, then compare your own scenario.
Guide written .
Open the Fixed-coupon bond valuation calculatorWhat to prepare
- Find the relevant statement, payslip or transaction record rather than estimating from a bank balance.
- Identify the tax year, transaction date and whether each amount is gross, net, annual or monthly.
- Separate known facts from assumed rates and check eligibility against the linked official sources.
Understand the inputs
The calculation method
Discount periodic coupons and redemption using the selected nominal yield; compute weighted maturity.
Worked example
Illustrative inputs and their result.
Example inputs
- Redemption / face value (€)
- 1000
- Annual coupon rate (%)
- 4
- Required nominal yield (%)
- 5
- Years to maturity
- 10
- Coupons per year
- 2
Calculated example result
- Bond Price
- €922.05
- Modified Duration Years
- 8.0542
How to interpret the result
Distinguish a tax saving, a tax bill, cash received and money remaining: they are not interchangeable. An estimate does not establish eligibility, filing compliance or when a refund will be paid.
Compare the same income or transaction under one changed assumption at a time. Keep a record of the year, date and assumptions so a change in the result can be explained.
Common mistakes to avoid
- Do not mix tax years or apply a newly announced measure to an earlier transaction.
- Avoid counting an allowance, credit, contribution or loss twice.
- Check exclusions and personal circumstances before relying on the headline result.
Assumptions and sources
On a coupon date; excludes accrued interest, default, calls, dealing costs and tax.
If your case falls outside this scope, use a more suitable calculator or contact us about an unclear method.