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Green Bond Premium Calculator
Green bonds (ESG-labeled) price tighter than conventional.
Premium value
$1,000,000
Rate savings bps
20
Annual savings
$100,000
How the math works
Rate savings = conventional − green. Annual = loan × savings. Total = annual × years.
6% − 5.8% = 20 bps. $50M × 0.2% = $100k/yr × 10 yrs = $1M premium value.
How to Use
- Enter loan amount.
- Enter conventional rate %.
- Enter green bond rate %.
- Enter loan term years.
- Read premium value.
Frequently Asked Questions
Green bond spread?
Institutional issuance 10-25 bps tighter than conventional. Better pricing driven by institutional ESG mandates. Market evolving — expect 15-35 bps compression as mandate ratios grow.
Certification cost?
Second-party opinion: $10-40k. Climate Bonds Initiative certification: $15-50k. Internal staff time to document use of proceeds, tracking, annual reporting: $10-30k additional. Total soft cost 0.01-0.05% of issue typically.
Use of proceeds?
Energy efficiency projects. Renewable energy. Green buildings (LEED, BREEAM). Pollution prevention. Sustainable transportation. Must track and annually report proceeds usage. Auditable standard.
How often should I rerun this?
Rerun this calculator whenever inputs change materially — new rent roll data, rate moves, loan balance updates, or quarterly operating data. For active deals, monthly refresh is typical. For stabilized assets under monitoring, quarterly is fine. Treat the output as a decision tool, not a one-time answer — market conditions evolve and so should your analysis.
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