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The Tax Policy Center's

Briefing Book

A citizen’s guide to the fascinating (though often complex) elements of the US tax system.

Tax Policy Center Briefing Book

The State of State (and Local) Tax Policy

  • Briefing Book
  • Fiscal Federalism and Fiscal Institutions
  • What are municipal bonds and how are they used?
  • Chapters
    • Introduction
      • Introduction
        • Introduction
    • Some Background
      • Federal Budget
        • What are the sources of revenue for the federal government?
        • How does the federal government spend its money?
        • What is the breakdown of revenues among federal, state, and local governments?
        • How do US taxes compare internationally?
      • Federal Budget Process
        • How does the federal budget process work?
        • What is the history of the federal budget process?
        • What is the schedule for the federal budget process?
        • What is reconciliation?
        • How is a budget resolution enforced?
        • What is PAYGO?
        • What are rescissions?
      • Federal Budget Outlook
        • How accurate are long-run budget projections?
        • What have budget trends been over the short and long term?
        • How much spending is uncontrollable?
        • What are tax extenders?
        • What options would increase federal revenues?
        • What does it mean for a government program to be off-budget?
        • How did the TCJA affect the federal budget outlook?
      • Taxes and the Economy
        • How do taxes affect the economy in the short run?
        • How do taxes affect the economy in the long run?
        • What are dynamic scoring and dynamic analysis?
        • Do tax cuts pay for themselves?
        • On what do economists agree and disagree about the effects of taxes on economic growth?
        • What are the economic effects of the Tax Cuts and Jobs Act?
      • Economic Stimulus
        • What is the role of monetary policy in alleviating economic downturns?
        • What are automatic stabilizers and how do they work?
        • What characteristics make fiscal stimulus most effective?
      • Distribution of Tax Burdens
        • How are federal taxes distributed?
        • Are federal taxes progressive?
        • How should progressivity be measured?
        • What is the difference between marginal and average tax rates?
        • What criticisms are levied against standard distributional analysis?
        • How should distributional tables be interpreted?
        • Who bears the burden of the corporate income tax?
        • Who bears the burden of federal excise taxes?
        • How do financing methods affect the distributional analyses of tax cuts?
        • How do taxes affect income inequality?
      • Tax Expenditures
        • What are tax expenditures and how are they structured?
        • What is the tax expenditure budget?
        • Why are tax expenditures controversial?
        • What are the largest tax expenditures?
        • How did the TCJA affect tax expenditures?
      • Tax Gap and Tax Shelters
        • What is the tax gap?
        • What does the IRS do and how can it be improved?
        • What is a tax shelter?
      • Recent History of the Tax Code
        • What did the 2008–10 tax stimulus acts do?
        • What did the American Taxpayer Relief Act of 2012 do?
        • How did the Tax Cuts and Jobs Act change personal taxes?
        • How did the Tax Cuts and Jobs Act change business taxes?
    • Key Elements of the U.S. Tax System
      • Individual Income Tax
        • What is the standard deduction?
        • What are itemized deductions and who claims them?
        • How did the TCJA change the standard deduction and itemized deductions?
        • What are personal exemptions?
        • How do federal income tax rates work?
        • What are tax credits and how do they differ from tax deductions?
        • How do phaseouts of tax provisions affect taxpayers?
      • Capital Gains and Dividends
        • How are capital gains taxed?
        • What is the effect of a lower tax rate for capital gains?
        • What is carried interest, and how is it taxed?
        • How might the taxation of capital gains be improved?
      • AMT
        • What is the AMT?
        • Who pays the AMT?
        • How much revenue does the AMT raise?
        • How did the TCJA change the AMT?
      • Taxes and the Family
        • What is the child tax credit?
        • What is the adoption tax credit?
        • What is the earned income tax credit?
        • Do all people eligible for the EITC participate?
        • How does the tax system subsidize child care expenses?
        • What are marriage penalties and bonuses?
        • How did the TCJA change taxes of families with children?
      • Taxes and the Poor
        • How does the federal tax system affect low-income households?
        • What is the difference between refundable and nonrefundable credits?
        • Can poor families benefit from the child tax credit?
        • Why do low-income families use tax preparers?
        • How does the earned income tax credit affect poor families?
        • What are error rates for refundable credits and what causes them?
        • How do IRS audits affect low-income families?
      • Taxes and Retirement Saving
        • What kinds of tax-favored retirement arrangements are there?
        • How large are the tax expenditures for retirement saving?
        • What are defined benefit retirement plans?
        • What are defined contribution retirement plans?
        • What types of nonemployer-sponsored retirement savings accounts are available?
        • What are Roth individual retirement accounts?
        • Who uses individual retirement accounts?
        • How does the availability of tax-favored retirement saving affect national saving?
        • What’s the difference between front-loaded and back-loaded retirement accounts?
        • What is an automatic 401(k)?
        • How might low- and middle-income households be encouraged to save?
      • Taxes and Charitable Giving
        • What is the tax treatment of charitable contributions?
        • What entities are tax-exempt?
        • Who benefits from the deduction for charitable contributions?
        • How would various proposals affect incentives for charitable giving?
        • How large are individual income tax incentives for charitable giving?
        • How did the TCJA affect incentives for charitable giving?
      • Taxes and Health Care
        • How much does the federal government spend on health care?
        • Who has health insurance coverage?
        • Which tax provisions subsidize the cost of health care?
        • How does the tax exclusion for employer-sponsored health insurance work?
        • What are premium tax credits?
        • What tax changes did the Affordable Care Act make?
        • How do health savings accounts work?
        • How do flexible spending accounts for health care expenses work?
        • What are health reimbursement arrangements and how do they work?
        • How might the tax exclusion for employer-sponsored health insurance (ESI) be reformed?
      • Taxes and Homeownership
        • What are the tax benefits of homeownership?
        • Do existing tax incentives increase homeownership?
      • Taxes and Education
        • What tax incentives exist for higher education?
        • What tax incentives exist to help families pay for college?
        • What tax incentives exist to help families save for education expenses?
        • What is the tax treatment of college and university endowments?
      • Tax Complexity
        • Why are taxes so complicated?
        • What are the benefits of simpler taxes?
        • What policy reforms could simplify the tax code?
      • Wealth Transfer Taxes
        • How do the estate, gift, and generation-skipping transfer taxes work?
        • Who pays the estate tax?
        • How many people pay the estate tax?
        • What is the difference between carryover basis and a step-up in basis?
        • How could we reform the estate tax?
        • What are the options for taxing wealth transfers?
        • What is an inheritance tax?
      • Payroll Taxes
        • What are the major federal payroll taxes, and how much money do they raise?
        • What is the unemployment insurance trust fund, and how is it financed?
        • What are the Social Security trust funds, and how are they financed?
        • Are the Social Security trust funds real?
        • What is the Medicare trust fund, and how is it financed?
      • Excise Taxes
        • What are the major federal excise taxes, and how much money do they raise?
        • What is the Highway Trust Fund, and how is it financed?
      • Energy and Environmental Taxes
        • What tax incentives encourage energy production from fossil fuels?
        • What tax incentives encourage alternatives to fossil fuels?
        • What is a carbon tax?
      • Business Taxes
        • How does the corporate income tax work?
        • What are pass-through businesses?
        • How are pass-through businesses taxed?
        • Is corporate income double-taxed?
      • Tax Incentives for Economic Development
        • What is the new markets tax credit, and how does it work?
        • What is the Low-Income Housing Tax Credit and how does it work?
        • What are Opportunity Zones and how do they work?
      • Taxes and Multinational Corporations
        • How does the current system of international taxation work?
        • How do US corporate income tax rates and revenues compare with other countries’?
        • What are the consequences of the new US international tax system?
        • How does the tax system affect US competitiveness?
        • How would formulary apportionment work?
        • What are inversions, and how will TCJA affect them?
        • What is a territorial tax and does the United States have one now?
        • What is the TCJA repatriation tax and how does it work?
        • What is the TCJA base erosion and anti-abuse tax and how does it work?
        • What is global intangible low-taxed income and how is it taxed under the TCJA?
        • What is foreign-derived intangible income and how is it taxed under the TCJA?
    • How Could We Improve the Federal Tax System?
      • Comprehensive Tax Reform
        • What is comprehensive tax reform?
        • What are the major options for comprehensive tax reform?
      • Broad-Based Income Tax
        • What is a broad-based income tax?
        • What would and would not be taxed under a broad-based income tax?
        • What would the tax rate be under a broad-based income tax?
      • National Retail Sales Tax
        • What is a national retail sales tax?
        • What would and would not be taxed under a national retail sales tax?
        • What would the tax rate be under a national retail sales tax?
        • What is the difference between a tax-exclusive and tax-inclusive sales tax rate?
        • Who bears the burden of a national retail sales tax?
        • Would tax evasion and avoidance be a significant problem for a national retail sales tax?
        • What would be the effect of a national retail sales tax on economic growth?
        • What transition rules would be needed for a national retail sales tax?
        • Would a national retail sales tax simplify the tax code?
        • What can state and local sales taxes tell us about a national retail sales tax?
        • What is the experience of other countries with national retail sales taxes?
        • What did the President’s Advisory Panel on Federal Tax Reform say about the national retail sales tax?
      • Value Added Tax (VAT)
        • What is a VAT?
        • How would a VAT be collected?
        • What would and would not be taxed under a VAT?
        • What would the tax rate be under a VAT?
        • What is the difference between zero rating and exempting a good in the VAT?
        • Who would bear the burden of a VAT?
        • Is the VAT a money machine?
        • How would small businesses be treated under a VAT?
        • What is the Canadian experience with a VAT?
        • Why is the VAT administratively superior to a retail sales tax?
        • What is the history of the VAT?
        • How are different consumption taxes related?
      • Other Comprehensive Tax Reforms
        • What is the flat tax?
        • What is the X-tax?
      • Recent Comprehensive Tax Reform Proposals
        • Simple, Fair, and Pro-Growth: Proposals to Fix America’s Tax System, Report of the President’s Advisory Panel on Federal Tax Reform, November 2005
        • The Moment of Truth: Report of the National Commission on Fiscal Responsibility and Reform, December 2010
        • Debt Reduction Task Force, “Restoring America’s Future,” Bipartisan Policy Center, November 2010
        • The Tax Reform Act of 2014: Fixing Our Broken Tax Code So That It Works for American Families and Job Creators, House Ways and Means Committee
        • The Graetz Competitive Tax Plan, Updated for 2015
      • Return-Free Tax Filing
        • What is return-free filing and how would it work?
        • What are the benefits of return-free filing?
        • What are the drawbacks of return-free filing?
        • How would the tax system need to change with return-free filing?
        • Who would qualify for return-free filing?
        • Would return-free filing raise taxes?
        • What was the experience with return-free filing in California?
        • What other countries use return-free filing?
    • The State of State (and Local) Tax Policy
      • State and Local Revenues
        • What are the sources of revenue for state governments?
        • What are the sources of revenue for local governments?
      • Specific State and Local Taxes
        • How do state and local individual income taxes work?
        • How do state and local sales taxes work?
        • How do state and local property taxes work?
        • How do state and local corporate income taxes work?
        • How do state estate and inheritance taxes work?
        • How do state earned income tax credits work?
        • How do state and local severance taxes work?
        • How do state and local soda taxes work?
        • How do marijuana taxes work?
      • Fiscal Federalism and Fiscal Institutions
        • How does the deduction for state and local taxes work?
        • What are municipal bonds and how are they used?
        • What types of federal grants are made to state and local governments and how do they work?
        • What are state rainy day funds, and how do they work?
        • What are tax and expenditure limits?
        • What are state balanced budget requirements and how do they work?
    • Glossary
      • Glossary
        • Glossary

What are municipal bonds and how are they used?

Fiscal Federalism and Fiscal Institutions

<2/6>
Q.

What are municipal bonds and how are they used?

A.

Municipal bonds (a term that encompasses both state and local government debt) are obligations that entitle owners to periodic interest payments plus repayment of principal at a specified date. States and localities (cities, townships, counties, school districts, and special districts) issue bonds primarily to pay for large, expensive, and long-lived capital projects.

State and local governments issue bonds to pay for large, expensive, and long-lived capital projects, such as roads, bridges, airports, schools, hospitals, water treatment facilities, power plants, courthouses, and other public buildings. Although states and localities can and sometimes do pay for capital investments with current revenues, borrowing allows them to spread the costs across multiple generations. Future project users bear some of the cost through higher taxes or tolls, fares, and other charges that help service the debts.

States and localities issue short-term debt or notes to help smooth uneven cash flows (e.g., when tax revenues arrive in April but expenditures occur throughout the year). They also issue debt on behalf of private entities (e.g., to build projects with public benefit or for so-called public-private partnerships).

HOW LARGE IS THE MUNI BOND MARKET?

At the end of 2019, state and local governments had $3.85 trillion in debt outstanding (figure 1). About 98 percent of this debt was long term or with a maturity of 13 months or longer, while the remaining 2 percent was short term. As in most years, roughly 40 percent of municipal debt was issued by states and 60 percent by local governments.

Although municipal debt has more than tripled in nominal terms since the mid-1980s, the change is less dramatic as a percentage of gross domestic product.

States vary widely in their long-term municipal debt outstanding (figure 2).

What Are the Main Types of State and Local Government Debt?

General obligation bonds are backed by an issuer’s “full faith and credit,” including its power to tax. Bonds may also be secured by future revenue streams, such as dedicated sales taxes or tolls and other user charges generated by the project being financed.

General obligation bonds typically require voter approval and are subject to limits on total debt outstanding. Revenue bonds and bonds secured by anticipated legislative appropriations are not subject to these requirements or limits. In 2018, roughly 58 percent of state and local issuances were revenue bonds, 36 percent were general obligation bonds, and 6 percent were private placements.

Who Holds State and Local Government Debt?

Most state and local bonds are held by households, followed by mutual funds (which also represent household investors) (figure 3). Banks and life insurance companies used to be more prominent municipal bond holders until the Tax Reform Act of 1986 and subsequent litigation limited the advantages of doing so.

How Does the Federal Tax Exemption Work and What Are Proposals for Reform?

Since its inception in 1913, the federal income tax has exempted interest payments received from municipal bonds from taxable income. State and local governments also typically exempt interest on bonds issued by taxpayers’ state of residence. However, the US Supreme Court in Department of Revenue of Ky. v. Davis upheld states’ ability to tax interest on bonds issued by other jurisdictions.

Because of the federal tax exemption, state and local governments can borrow more cheaply than other debt issuers, such as corporations, for a given level of risk and length of maturity. The federal tax exemption therefore functions as a federal subsidy to state and local public infrastructure investment. This subsidy comes at a cost in foregone tax revenues, estimated at $28 billion in fiscal year 2020.

The federal tax exemption has been criticized as inefficient because high-bracket taxpayers receive more than the inducement needed to purchase municipal bonds. In 2018, for example, a high-grade tax-exempt municipal bond yielded 3.53 percent. The yield for a comparable taxable corporate bond was 3.93 percent. Thus, taxpayers whose federal tax rate is about 10 percent should be just indifferent between the two types of bonds (the gap in yields—0.4 percentage points—is about 10 percent of 3.93 percentage points). Anyone in a higher tax bracket receives a windfall that generates no additional benefit for the borrower.

In light of this inefficiency, proposals have long circulated to cap the federal tax exemption, most recently by former Vice President Joe Biden among his 2020 campaign tax proposals. However, the revenue gain from eliminating or capping the deduction would depend on whether states and localities responded by issuing as many or fewer bonds and whether bondholders responded by shifting their portfolios toward taxable bonds or other investments (Poterba and Verdugo 2011). It is also difficult to hold constant all relevant bond features, including risk, time to maturity, fixed versus variable interest payments, and liquidity (Congressional Budget Office and Joint Committee on Taxation 2009).

Notably, President Donald Trump’s most recent budget proposals have not suggested a cap on the bond interest exemption.

Updated May 2020
Data Sources

Board of Governors of the Federal Reserve System. “Financial Accounts of the United States.” March 12, 2020.

Securities Industry and Financial Markets Association. “US Municipal Issuance.” https://www.sifma.org/resources/research/us-municipal-issuance/.

Urban-Brookings Tax Policy Center. “State and Local Finance Initiative Data Query System.” Accessed March 9, 2020.

US Census Bureau. Annual Survey of State and Local Government Finances.

US Census Bureau. Annual Survey of State and Local Government Finances. Government Finances, Volume 4, and Census of Governments (2017). Accessed March 9, 2020.

                   . Census of Governments, vol. 4, Government Finances.

Further Reading

Congressional Budget Office and Joint Committee on Taxation. 2009. “Subsidizing Infrastructure Investment with Tax-Preferred Bonds.” Washington, DC: Congressional Budget Office and Joint Committee on Taxation.

Galper, Harvey, Kim Rueben, Richard Auxier, and Amanda Eng. 2014. “Municipal Debt: What Does It Buy and Who Benefits?” National Tax Journal 67 (4): 901–24.

Gordon, Tracy. 2011. “Buy and Hold (on Tight): The Recent Muni Bond Rollercoaster and What It Means for Cities.” Washington, DC: Urban Institute.

Maguire, Steven. 2012. “Tax-Exempt Bonds: A Description of State and Local Government Debt.” RL30638. Washington, DC: Congressional Research Service.

Office of Management and Budget. 2017. Analytical Perspectives: Budget of the United States Government, Fiscal Year 2018. Washington, DC: Office of Management and Budget.

Poterba, James M., and Verdugo, Arturo Ramírez. 2011. “Portfolio Substitution and the Revenue Cost of the Federal Income Tax Exemption for State and Local Government Bonds.” National Tax Journal 64 (2): 591–614.

Securities and Exchange Commission (SEC). 2012. “Report on the Municipal Securities Market.” Washington, DC: SEC.

US Government Accountability Office (GAO). 2012. “Municipal Securities: Overview of Market Structure, Pricing, and Regulation.” Washington, DC: US GAO.

Zimmerman, Dennis. 2005. “Tax Exempt Bonds.” in The Encyclopedia of Taxation and Tax Policy, 2nd ed., edited by Joseph J. Cordes, Robert D. Ebel, and Jane G. Gravelle, 404–406. Washington, DC: Urban Institute Press

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