Tap Issue

Issuer Right to issue more notional

Dominik Konold Founder · Jan 23, 2026 · 4 min read

An overview of embedded tap issue rights, their IFRS 9 accounting treatment, and practical treasury management considerations.

What Is an Embedded Tap Issue Right?

An embedded tap issue right is an embedded derivative that gives the issuer of a bond the right to increase the outstanding notional amount of an existing bond by issuing additional tranches under the same contractual terms as the original instrument.

The tap issue right is embedded in the bond documentation and cannot be traded separately from the host contract. Economically, it provides the issuer with flexibility to raise additional funding without issuing a new bond, subject to predefined conditions.

How Embedded Tap Issue Rights Work

A tap issue right allows the issuer to issue additional notional:

At predefined dates or during a defined tap window
Under the same coupon, maturity, and structural terms
Often at or close to the original issue price

If the tap issue right is exercised:

The total outstanding notional of the bond increases
Existing bondholders are typically diluted on a proportional basis
The issuer raises additional funds without renegotiating documentation

Tap issue rights are common in medium-term note programs, public sector funding, and structured debt issuances.

Economic Purpose of Tap Issue Rights

Tap issue rights are primarily used to:

Optimize funding flexibility
Reduce issuance and documentation costs
Take advantage of favorable market conditions
Increase liquidity of an existing bond line

From an economic perspective, a tap issue right gives the issuer an option on future funding conditions, allowing it to issue additional debt only if market terms are attractive.

Numerical Example: Tap Issue Right

Assume a bond with the following terms:

Outstanding notional: €100 million
Coupon: 3.0% fixed
Remaining maturity: 6 years
Tap issue right: Up to €50 million additional notional

Scenario A: Market rates decline

Market yield for comparable new issuance: 2.0%

Issuing a new bond would require a lower coupon, but the issuer can issue additional notional at 3.0% under the existing bond terms. The tap issue right is economically attractive, and the issuer is likely to exercise it.

Scenario B: Market rates increase

Market yield for comparable new issuance: 4.5%

Issuing additional notional at 3.0% would be unattractive to investors or require pricing adjustments. The issuer is unlikely to exercise the tap issue right.

Key takeaway

The value of the tap issue right arises from the issuer’s ability to choose whether or not to issue additional notional, depending on prevailing market conditions.

Accounting and Valuation

Embedded Tap Issue Rights Under IFRS 9

Under IFRS 9, embedded tap issue rights must be assessed to determine whether they are closely related to the host debt instrument.

Key assessment questions include:

Is the additional notional issued at a market-consistent price?
Does the tap issue materially alter the risk profile of the bond?
Does the issuer gain a funding advantage compared to issuing a new bond?

If the tap issue right is not closely related:

The embedded right must be bifurcated
It is measured at fair value
Fair value changes are recognized through profit or loss (P&L)

This makes tap issue rights particularly relevant for IFRS 9 compliance and valuation governance.

Valuation of Embedded Tap Issue Rights

The valuation of an embedded tap issue right focuses on the issuer’s ability to issue additional notional under potentially favorable conditions compared to current market funding levels.

Key valuation drivers include:

Risk-free interest rate curves
Issuer credit spreads
Coupon level of the original bond
Market liquidity and issuance costs
Volatility of interest rates and credit spreads

Interest Rate and Credit Spread Modeling

Valuation is typically performed using stochastic simulation techniques, similar to other issuer options embedded in debt instruments.

Common modeling approaches include:

Hull–White one-factor models for simulating future risk-free interest rates
Diffusion or CIR-type models for simulating credit spread dynamics

For each simulated scenario:

Market funding conditions at potential tap dates are projected
The economic benefit of issuing under existing bond terms is assessed
The issuer’s optimal exercise decision is determined
Expected benefits are discounted using scenario-consistent curves

The fair value of the tap issue right is calculated as the expected present value of the issuer’s funding advantage.

Why Embedded Tap Issue Rights Matter for Treasury and Accounting

Embedded tap issue rights:

Introduce funding optionality into debt instruments
Can materially affect fair value measurement
May require bifurcation under IFRS 9
Demand robust valuation and documentation

For treasury and accounting teams, automated identification and valuation of tap issue rights is essential for accurate financial reporting and audit readiness.

Summary

An embedded tap issue right gives the issuer flexibility to increase the notional of a bond under predefined conditions. Under IFRS 9, these rights may require bifurcation and fair value measurement through P&L, making them an important consideration in treasury accounting and structured debt valuation.

FAQ

What is an embedded tap issue right?

When would an issuer exercise a tap issue right?

Do tap issue rights require bifurcation under IFRS 9?

Written by

Dominik Konold

Founder

Dominik is the founder of Finflexia and an expert in treasury accounting, financial instrument valuation and IFRS compliance. Since 2016, he's been a certified Professional Risk Manager (PRMIA) and also lectures for the Association of Public Banks and the Academy of International Accounting. He built Finflexia to help treasury teams automate complex accounting workflows.

Explore More Embedded Derivatives

Learn about all types of embedded derivatives supported by Finflexia.

All Embedded Derivatives