A general obligation bond, commonly called a GO bond, is a municipal bond backed by the full taxing power and general revenue of the state or local government that issues it, rather than by income from a specific project. Governments use GO bonds to finance long-term public infrastructure like schools, highways, and water systems, and the broad pledge behind them makes GO bonds one of the safer categories in the fixed-income market.
How the Full Faith and Credit Pledge Works
The defining phrase for a GO bond is “full faith and credit.” When a government issues one, it promises to repay bondholders using every legally available revenue source, not just a single dedicated stream.1Municipal Securities Rulemaking Board. Sources of Repayment If property tax collections fall short, the issuer can draw on sales taxes, income taxes, license fees, or anything else flowing into its general fund. Repayment is not tied to whether a particular toll road turns a profit or a utility collects enough in user fees.
The mechanics vary more than most investors realize. Local governments typically repay GO bonds from ad valorem property taxes, while state-issued GO bonds are often repaid through legislative appropriations.2Municipal Securities Rulemaking Board. MSRB Glossary of Municipal Securities Terms The precise source and priority of payment can differ considerably from one issuer to the next depending on state and local law. A county GO bond in one state might carry an ironclad property tax pledge; a city GO bond elsewhere might depend on annual budget appropriations. What ties the category together is that the government’s broad revenue base stands behind the debt.
Unlimited Tax vs. Limited Tax GO Bonds
Not all GO bonds carry the same strength of pledge. The distinction comes down to whether the issuer faces a cap on how much it can raise taxes to service the debt.
Unlimited Tax GO Bonds
An unlimited tax general obligation bond (UTGO) lets the issuer levy property taxes without any rate cap to cover debt service. If assessed values drop and revenue falls short, the government can raise the tax rate as high as necessary to make bondholders whole.1Municipal Securities Rulemaking Board. Sources of Repayment That open-ended commitment translates into stronger credit ratings and lower borrowing costs.
Limited Tax GO Bonds
A limited tax general obligation bond (LTGO) caps the property tax rate the issuer can impose, usually through a state constitutional or statutory limit. The full faith and credit pledge still applies, but the issuer cannot raise the millage above the legal ceiling.2Municipal Securities Rulemaking Board. MSRB Glossary of Municipal Securities Terms Growth in assessed values has to do the work of increasing total revenue within that fixed rate. LTGOs typically trade at slightly higher yields to compensate for this constraint. The gap between the two structures showed up in Detroit’s 2013 bankruptcy, where holders of unlimited tax GO bonds recovered roughly 74 cents on the dollar while limited tax GO bondholders received about 34 cents.
GO Bonds Versus Revenue Bonds
The fundamental split in the municipal bond world is between general obligation bonds and revenue bonds, and it comes down to what stands behind the debt. A GO bond commits the issuer’s entire fiscal capacity. A revenue bond commits only the cash flow from the specific project the bond finances.1Municipal Securities Rulemaking Board. Sources of Repayment
If a toll road financed by revenue bonds underperforms, bondholders absorb the loss. They cannot force the municipality to redirect general fund revenue to cover the shortfall. With a GO bond, the entire tax base effectively guarantees repayment, so the investor’s risk tracks the overall economic health of the jurisdiction rather than any single project.
A third category blends both structures. Sometimes called double-barreled bonds, these pledge a specific revenue stream and the issuer’s general taxing power as backup. If project revenue falls short, the municipality covers the gap from its general fund.
Tax Treatment
One of the biggest draws is the federal tax exemption on GO bond interest. Under federal law, gross income does not include interest on state or local bonds, provided the bonds meet certain requirements and are not classified as private activity bonds, arbitrage bonds, or bonds that fail registration requirements.3Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds GO bonds issued for traditional public purposes like schools and roads almost always qualify. Interest is also generally excluded from the alternative minimum tax, unlike interest on many private activity bonds.
If you live in the state that issued the bond, the interest is often exempt from state and local income taxes as well, creating a double tax-exempt return.4Municipal Securities Rulemaking Board. Municipal Bond Basics The higher your marginal tax bracket, the more valuable that exemption becomes.
Voter Authorization
Because GO bonds pledge taxpayer dollars, most jurisdictions require some form of public authorization before issuing the debt. The process typically starts with a legislative body, such as a city council or state legislature, approving the intent to borrow and defining the project scope and amount. In many cases, a public referendum follows.1Municipal Securities Rulemaking Board. Sources of Repayment
Voter approval is not universal. Whether a referendum is required depends on the state constitution, statute, or local ordinance governing the issuer.2Municipal Securities Rulemaking Board. MSRB Glossary of Municipal Securities Terms Some states require a vote for all GO debt; others allow certain issuances with only legislative sign-off. Revenue bonds, by contrast, generally do not require voter approval because they pledge project income rather than tax revenue.
Safety and Default History
Rating agencies evaluate GO bonds by looking at the issuer’s economic base, financial management, existing debt burden, and other factors affecting repayment capacity. The standard scale runs from AAA down to D, with BBB- and above considered investment grade.5Municipal Securities Rulemaking Board. Credit Rating Basics for Municipal Bond Investors Most GO bonds carry investment-grade ratings because of the strength of the full faith and credit pledge.
The default numbers back up that reputation. Between 1970 and 2022, investment-grade municipal bonds had a five-year cumulative default rate of just 0.04%, compared with 0.87% for investment-grade corporate bonds. Speculative-grade municipal bonds defaulted at 4.63% over five years, against 18.71% for speculative-grade corporate debt. General government issuers, the category covering most GO bonds, defaulted at 0.03% across all rated credits.6Moody’s Investors Service. US Municipal Bond Defaults and Recoveries 1970-2022
Risks to Understand
Low default rates do not mean GO bonds are risk-free. Like all fixed-rate bonds, they lose market value when interest rates rise, and longer maturities swing more sharply than shorter ones. That price movement matters only if you sell before maturity, but it does matter.
Credit risk is rare but real. In a Chapter 9 bankruptcy, GO bonds are treated as general unsecured debt. The municipality is not required to make principal or interest payments during the case, and the obligations are subject to negotiation and possible restructuring under the plan of adjustment.7United States Courts. Chapter 9 – Bankruptcy Basics The full faith and credit pledge does not guarantee bondholders a front-of-line position. Whether a state statutory lien offers additional protection depends on the specific language of that lien under state law.
Liquidity is thinner than in stocks or Treasuries. Many GO bonds sit in buy-and-hold portfolios and rarely change hands, which can make selling at a fair price difficult on short notice. And many issues include call provisions, letting the issuer redeem bonds before maturity, typically after a set number of years. If rates fall, your bonds may be called and you may have to reinvest at a lower yield.
How to Research and Buy GO Bonds
Individual investors can buy GO bonds through a brokerage account, either on the primary market when bonds are first issued or on the secondary market from other holders. Brokers are usually compensated through a markup over what they paid for the bond, which may be disclosed on your confirmation statement.8Investor.gov. Municipal Bonds Ask about markups and commissions before trading.
Before buying, research specific bonds on EMMA, the Electronic Municipal Market Access system operated by the MSRB and designated by the SEC as the official repository for municipal securities data and disclosure documents.9Municipal Securities Rulemaking Board. EMMA – Electronic Municipal Market Access EMMA offers free access to offering documents, financial disclosures, trade prices, and credit ratings. It is a research tool, not a trading platform, but it is the single best place to evaluate a municipal bond’s fundamentals. If picking individual bonds sounds like too much work, municipal bond mutual funds and ETFs give you exposure to GO bonds with built-in diversification.