UK Local Authority and PWLB Equivalents
UK Local Authority and PWLB Equivalents
The United States is nearly unique in having a large, tax-exempt municipal bond market. In the United Kingdom and most other countries, local governments borrow through different mechanisms: bank loans, direct government programs (like the PWLB), and bond markets, but without tax exemption. Understanding why illustrates how U.S. tax policy created a unique asset class.
Key takeaways
- The UK has no equivalent to U.S. tax-exempt municipal bonds; there is no tax exemption for local authority (council) debt
- English councils borrow primarily through the Public Works Loan Board (PWLB), a government lending facility offering fixed-rate loans
- Councils rarely issue bonds directly; the PWLB program dominates local government borrowing
- Some councils have issued bonds in recent years (particularly green bonds), but these are fully taxable and therefore niche
- The absence of tax exemption reflects different constitutional structures: UK unitary government vs. U.S. federalism
Local government structure in the UK
The United Kingdom's government is unitary — ultimate sovereignty rests with Parliament. Local governments (councils in England, local authorities in Scotland and Wales, councils in Northern Ireland) are creatures of the central government, deriving their powers from Parliament.
The United States, by contrast, is federal — the states have sovereign power (within the Constitution), and the federal government's powers are limited. This federalism is why the federal government exempts state and local bond interest: states are sovereign entities, not subordinates of Washington.
The UK structure means there is no constitutional principle preventing Parliament from taxing local authority bond interest. Tax exemption would require an affirmative legislative choice, and there is no political constituency for it. Local authorities have never pushed hard for it, and Westminster has never offered it.
As a result, UK councils borrow without the tax-exemption advantage that U.S. municipalities enjoy.
The Public Works Loan Board (PWLB)
The PWLB is a division of the UK government's debt management office. It exists to provide low-cost loans to local authorities for capital spending. A council that needs to build a new leisure center, refurbish a library, or invest in infrastructure can borrow from the PWLB.
How PWLB works:
- A council applies for a loan, specifying the amount and the desired maturity (typically 1 to 50 years)
- The PWLB approves the loan (assuming the council meets affordability tests) and advances funds
- The council pays interest quarterly based on a fixed rate tied to UK gilt (Treasury) yields
- The council must repay principal at maturity
The PWLB rate is typically gilt yield + a spread (0.5% to 1.0% above gilts, depending on maturity and risk). In 2024, for a 25-year loan, the PWLB rate might be 4.5% to 5%, compared to a 25-year gilt at roughly 3.8%.
Advantages for councils:
- Low cost (cheaper than commercial bank lending)
- Long-term fixed rates (reducing refinancing risk)
- Stable access (the PWLB doesn't withdraw lending during credit crises like banks do)
- Flexible amortization (councils can tailor repayment schedules)
Disadvantages:
- Limited flexibility (the PWLB imposes affordability tests and limits borrowing)
- Political oversight (the government can and has restricted PWLB lending for policy reasons)
- No secondary market (PWLB loans are held to maturity, so they cannot be easily sold)
In 2020-2021, the central government restricted PWLB access to encourage councils to spend reserves and reduce short-term borrowing. This created a shortage of borrowing capacity for councils and forced some to issue bonds in the capital market.
UK council bonds: recent growth
Historically, English councils rarely issued bonds. The PWLB was sufficient for their borrowing needs. But as PWLB access tightened, some councils explored bond issuance.
Recent UK council bond issuers (2020–present):
- Thurrock Council: Issued bonds to finance commercial real estate investments and short-term debt; faced financial distress and restructured debt in 2023
- Slough Borough Council: Issued bonds; also faced financial difficulties and sought restructuring
- Coventry City Council: Issued bonds alongside PWLB borrowing
- Leeds City Council: Issued green bonds to finance sustainability projects
These bonds are fully taxable (no tax exemption) and typically rated BB to BBB (below-investment-grade to investment-grade, depending on the council's finances). Yields range from 3% to 6%, depending on the issuer and maturity.
Why bonds instead of PWLB? Bonds offered longer maturities and greater flexibility than PWLB's restricted lending. For councils desperate to finance spending, bonds were an alternative when PWLB capacity was constrained.
Comparison: US munis vs. UK council bonds
U.S. Municipal Bond (example: Ohio schools, 10-year)
- Coupon: 3.5% (tax-exempt at federal and Ohio levels)
- After-tax yield (37% bracket): 5.56% equivalent
- Credit rating: A+
- Liquidity: Reasonable secondary market
- Investor base: Retail, institutional
UK Council Bond (example: Coventry, 10-year hypothetical)
- Coupon: 4.2% (fully taxable)
- After-tax yield (37% bracket): 2.65%
- Credit rating: A (if any)
- Liquidity: Very poor to nonexistent
- Investor base: Primarily institutional
The muni provides far better after-tax value (5.56% equivalent vs. 2.65%) and is more liquid. The council bond would not be attractive to a taxable investor.
European municipal financing structures
The UK pattern extends to much of Europe. Most European countries lack tax-exempt municipal bond markets comparable to the U.S.
Germany: Municipalities borrow through KfW (a government development bank) at subsidized rates. No tax exemption; instead, government-backed lending is the mechanism.
France: Local authorities borrow through the Caisse d'Epargne (a public bank) or capital markets, but without tax exemption. Financing is heavily subsidized by the central government and the EU.
Nordic countries: Municipalities issue bonds with government backing or guarantees, but without tax exemption. The borrowing costs are still low due to strong credit and central government support.
Italy, Spain: Municipalities face tighter borrowing constraints and rely more on government grants than borrowing. When they borrow, it is in capital markets without tax exemption.
The pattern is clear: without a strong federal system and a constitutional distinction between federal and state/local governments, tax exemption for local borrowing does not emerge as a policy.
Why the U.S. is unique
The U.S. municipal bond market is exceptional because of:
- Federalism: U.S. states are sovereign entities with their own constitutional powers, creating a rationale for federal non-interference in state/local borrowing
- Longevity: The tax exemption has existed since 1913 and has become entrenched politically (breaking it would trigger fierce opposition from issuers and investors)
- Size: The massive ($4 trillion) muni market means breaking the exemption would have huge fiscal and market implications
- Voter approval: U.S. municipalities often require voter approval for bond issuance, creating a grassroots constituency for low-cost borrowing
- Political power: Municipal issuers (school districts, city governments, states) are powerful voting constituencies that defend the exemption
No other country has this combination of factors.
Practical implications for international investors
If you are a U.S. investor:
- Tax-exempt U.S. munis are superior to UK council bonds on an after-tax basis
- UK bonds are generally not worth holding in a taxable account
- In a tax-deferred account (if you could own them), UK bonds might be worth considering for yield, but they are far less liquid
If you are a UK investor:
- You cannot benefit from U.S. muni tax exemption (you would owe UK tax on any U.S. interest income)
- U.S. munis are only valuable if their yield compensates for the tax burden and currency risk
- UK council bonds (or PWLB-backed municipals) are more natural choices if you need local-government exposure
If you are a non-UK, non-U.S. investor:
- Both U.S. munis and UK council bonds are foreign assets with tax consequences under your home country's rules
- Currency risk and repatriation rules matter more than the tax-exemption feature
- Holding foreign municipal bonds is usually not a core strategy unless you have specific local currency needs
The role of government funding for infrastructure
The absence of a tax-exempt muni market in the UK and Europe does not mean local governments lack infrastructure funding. Instead, they rely on:
- Direct government grants: Central government funds local infrastructure through grants and subsidies
- European funding: EU provides grants and loans (especially pre-2020) for infrastructure in member states
- Bank lending: Commercial banks provide loans, though at higher cost than PWLB
- Public-private partnerships (PPPs): Government contracts with private firms to build and operate infrastructure
- User fees: Tolls, parking charges, and other revenue-based models finance specific projects
The U.S. approach (tax-exempt bonds) is really a form of tax expenditure — the government is subsidizing local infrastructure by forgoing federal income tax. In other countries, the subsidy is explicit (direct grants) or embedded in government lending programs (like the PWLB).
From a fiscal transparency perspective, direct grants might be clearer than tax expenditures. But they also require central government to actively decide and approve each project, creating more bureaucracy.
Flowchart: municipal bond options by country
Next
Municipal bonds in the U.S. are powerful because of tax exemption. But the credit quality of the issuer matters enormously — even tax-exempt interest from a failing municipality is worthless if the issuer defaults. In the next article, we'll examine how to assess the credit quality of municipal issuers, and why historical default rates have been so low.