Key data
| Regulation | Order ECM/946/2026, of 9 September 2026 |
|---|---|
| Publication | 10 September 2026 |
| Entry into force | 15 September 2026 (issuance date by syndication) |
| Affected parties | Institutional investors, financial entities and public debt markets |
| Category | Tax News |
| Year | 2026 |
| Nominal amount awarded | €4,000 million |
| Annual nominal rate | 4.25% |
| Subscription price | 99.764% |
| Internal yield (IRR) | 4.268% |
| Term | 20 years |
| First coupon | 3.702740% gross — payable on 30 July 2027 |
| Commissions | 0.205% of the nominal amount awarded |
| Programme | Second reference of Spain's sovereign green bonds programme |
| Regulatory framework | Green Bonds Framework updated in September 2026 |
Spain has just closed the second issuance of its sovereign green bonds programme: €4,000 million at 20 years at 4.25% nominal, placed on 15 September 2026 through syndication. Order ECM/946/2026 publishes the official results and completes the characteristics of the issuance.
For institutional investors and financial entities participating in public debt markets, this issuance offers an internal yield of 4.268% — slightly higher than the nominal coupon due to the discount in the subscription price — backed by the sovereign credit of the Spanish State and the green label increasingly required by ESG investment mandates.
What does this regulation establish?
Order ECM/946/2026 publishes the results of the first tranche of State Bonds at 20 years issued by syndication on 15 September 2026, and completes the technical characteristics of the issuance. The final parameters are as follows:
| Parameter | Value |
|---|---|
| Annual nominal rate | 4.25% |
| Subscription price | 99.764% |
| Internal yield (IRR) | 4.268% |
| Nominal amount awarded | €4,000,000,000 |
| Term | 20 years |
| Issuance procedure | Syndication |
| Issuance date | 15 September 2026 |
| First coupon (date) | 30 July 2027 |
| First coupon (gross amount) | 3.702740% on nominal balance |
| Commissions (administration, subscription and placement) | 0.205% of the nominal amount awarded |
| Position in the programme | Second reference of the sovereign green bonds programme |
| Applicable framework | Spain's Green Bonds Framework, updated in September 2026 |
The subscription price below par (99.764%) means that investors acquire the bond at a small discount, which raises the effective yield above the nominal coupon: hence the difference between the 4.25% nominal and the 4.268% IRR.
The first coupon is lower than the ordinary annual coupon because it covers an irregular period: from the issuance date (15 September 2026) to 30 July 2027, which does not equal a full year. From that point on, ordinary annual coupons will be 4.25% gross.
Economic and operational impact
The administration, subscription and placement commissions of 0.205% on the nominal amount awarded amount to approximately €8.2 million on the €4,000 million issued. This cost falls on the Public Treasury and not on the final investor.
For institutional investors, the issuance presents the following operational and portfolio implications:
- Guaranteed long-term returns: the 4.268% IRR over 20 years provides visibility of cash flows over a very long horizon, particularly relevant for insurers and pension funds with long-term liabilities.
- Sovereign green label: as the second reference of Spain's sovereign green bonds programme, investors with ESG mandates can count it within their sustainable asset portfolios, backed by the Green Bonds Framework updated in September 2026.
- Market liquidity: the volume of €4,000 million ensures a liquid reference in the secondary market for long-term Spanish sovereign debt.
- Coupon taxation: the first coupon of 3.702740% gross will be paid on 30 July 2027 and will be subject to the withholding applicable to investment income under current tax regulations.
Who does it affect?
- Institutional investors: investment funds, pension funds, insurers and asset managers participating in syndicated sovereign public debt issuances.
- Financial entities: banks and credit institutions with sovereign fixed income portfolios or acting as placement entities in Treasury syndications.
- Managers with ESG mandates: investors who need sovereign green assets to comply with sustainable investment policies or regulatory disclosure requirements (SFDR, EU taxonomy).
- Public debt markets: operators and market makers in Spanish State debt managing positions in the long end of the sovereign curve.
- Corporate CFOs and treasurers: companies that use the Spanish sovereign curve as a benchmark for their own debt issuances or to value their fixed income portfolios.
Practical example
An insurer that subscribes to €50 million nominal in this issuance at the price of 99.764% disburses €49,882,000 on the issuance date (15 September 2026).
On 30 July 2027 it will receive the first coupon: 3.702740% on €50 million nominal equals €1,851,370 gross. From then on, each year it will receive the ordinary coupon of 4.25%, that is, €2,125,000 gross annually for the remaining 19 years until maturity.
On the total amount of the issuance, commissions of 0.205% amount to €8,200,000 that the Treasury pays to the entities participating in the syndication for administration, subscription and placement services.
What should companies do now?
- Review ESG eligibility of the issuance: if you manage portfolios with sustainable investment mandates, verify that this second reference of Spain's sovereign green bonds programme is compatible with your investment policy and with the requirements of the Green Bonds Framework updated in September 2026.
- Evaluate the impact on the yield curve: the 4.268% yield at 20 years is a key reference for valuing your own corporate issuances or for adjusting the duration of Spanish sovereign fixed income portfolios.
- Plan the taxation of the first coupon: the receipt of 3.702740% gross on 30 July 2027 should be anticipated in the tax and accounting planning for 2027, including applicable withholding.
- Record commissions correctly: entities that participated in the syndication must account for the 0.205% commission on the nominal amount awarded in accordance with applicable accounting regulations.
- Monitor the secondary market: given the volume of €4,000 million, this reference will have liquidity in the secondary market. Following its evolution is relevant for managing positions in the long end of Spanish sovereign debt.
Frequently asked questions
What is the internal yield of the Spanish green bond issued in September 2026?
The internal yield (IRR) is 4.268%. The annual nominal rate is 4.25% and the subscription price was 99.764%, which generates that small difference between coupon and effective yield.
When is the first coupon of the 20-year State Bonds from September 2026 paid?
The first coupon will be paid on 30 July 2027 and will be 3.702740% gross on the nominal balance, an amount lower than the ordinary annual coupon because it covers a period shorter than a full year (from 15 September 2026 to 30 July 2027).
What commissions apply to this State green bonds issuance?
The administration, subscription and placement commissions agreed are 0.205% on the nominal amount awarded, that is, approximately €8.2 million on the €4,000 million issued.
Is this the first issuance of Spain's sovereign green bonds?
No. This is the second reference issued under Spain's sovereign green bonds programme, in accordance with the Green Bonds Framework updated in September 2026.
How was the issuance carried out and who can access these bonds?
The issuance was carried out through the syndication procedure on 15 September 2026. It is aimed at institutional investors and financial entities participating in public debt markets. It is not an issuance directly accessible to retail investors in the primary market.
Official source
View complete regulation at official source
Disclaimer: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://www.boe.es/diario_boe/txt.php?id=BOE-A-2026-18986
