Massachusetts Tax-Equivalent Yield Calculator (2026)
Includes the 4% "Fair Share" surtax to show the true value of MA in-state municipal bonds for high earners.
Locked to Massachusetts
Defaults to top marginal bracket. Advanced users may edit or change.
Tax-Equivalent Yield
To match a 3.50% tax-free yield, a taxable bond must pay 6.97%.
Tax efficiency applies to both income and capital gains.If you are optimizing after-tax bond income, you may also benefit from reviewing ETF correlation data for tax-loss harvesting.
Estimates based on projected 2026 marginal tax brackets. Assumes in-state municipal bond (exempt from Federal & State tax). Consult a tax professional for specific advice.
TaxLossPairs.comMacro Tax Perspective: The 9% State Shield
The "Fair Share" surtax creates a permanent 4% additional drag for millionaires on top of the 5% flat tax. In-state Massachusetts bonds shield high earners from this entire 9% total state drag.
Because these state taxes are largely non-deductible at the federal level, choosing in-state MA bonds provides an immediate 9% "bonus" compared to taxable alternatives.
Local Tax FAQs
How is the 9% Massachusetts tax rate determined?
We use the combined 5% flat tax and 4% surtax (for income over $1 million) to provide a conservative "ceiling" for estimation.
Do I pay MA tax on municipal bonds from other states?
Yes. Massachusetts taxes interest from municipal bonds issued by other states at the full combined rate (up to 9%).
How does the 2026 SALT cap affect MA muni bond savings?
The $40,400 cap phases out for millionaires, ensuring that avoiding state tax via in-state bonds remains a highly efficient "pure" saving.
Does the 4% surtax apply to capital gains?
Yes. The 4% "Fair Share" surtax applies to all taxable income over $1M, including gains from selling bonds.
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Optimize Your Capital Gains
High earners often pair tax-free income with strategic loss harvesting. Have realized losses? Use our decision engine to check if you should harvest.