How Bond-Proceeds Reinvestment Differs by Issuer Sector

Bond-proceeds reinvestment differs by sector in three linked ways: the source of repayment behind the bonds, the funds the closing creates, and the speed at which the project draws.

Those three variables, rather than the sector's name, shape how long each dollar can stay invested and which federal limits reach it, which is why the sector guides on this site start from the same map set out in the guide to investing bond proceeds.

This page gives the overview by sector, then the typical funds and draw profiles, and closes with the rules that follow the proceeds whatever the issuer's line of work.

Overview by sector

By sector, the first difference is the repayment source: revenue issuers pledge specific revenues, while most general obligation bonds carry the issuer's full faith and credit and often its taxing power, depending on state or local law, and that choice drives the documents, the funds and the statutory frame around each.

The MSRB glossary defines a revenue bond as one payable from a specific source of revenue and notes that, generally, no voter approval is required before such an issue, with the caveat that voter-approval rules vary by state.

Its examples of pledged revenues include project operations, grants, and excise or other non-ad valorem taxes, and they are the pledged-revenue sources behind the revenue sectors this page maps: airports, public power suppliers, water and sewer systems, and toll roads.

The guide to GO and revenue bonds covers that contrast in full.

On the other side, GFOA's best practice on investment and management of bond proceeds cites the GO bond as its example of an issue with no indenture, and says the investment policy should then list permitted investments, which may be a subset of those allowed for operating funds.

Where a city, county or school district GO issue has no indenture, the policy rather than indenture sections therefore carries the permitted-investment list, which is the starting point for the guides to cities and counties and school districts.

Which sectors carry private activity bond character?

Section 141(a) makes a bond a private activity bond if its issue meets both the private business use test and the private security or payment test, or if it meets the private loan financing test.

The MSRB glossary describes the conduit version of the same idea: a governmental issuer issues bonds to finance a project used mainly by a third party, the conduit borrower, who is liable for the debt service.

The glossary's common conduit types include industrial development bonds, multifamily housing revenue bonds and qualified 501(c)(3) bonds, and where a housing, healthcare or higher education project is financed through one of these, it sits on this side of the map.

A private activity bond can still be tax-exempt if it is a qualified bond, and section 141(e) lists the qualified categories: exempt facility bonds, qualified mortgage bonds, qualified veterans' mortgage bonds, qualified small issue bonds, qualified student loan bonds, qualified redevelopment bonds and qualified 501(c)(3) bonds, subject to the applicable volume cap in section 146 and the requirements of section 147.

IRS Publication 4078 lists the exempt facilities under section 142, which include airports and spaceports, docks and wharves, mass commuting, water, sewage, solid waste, qualified residential rental, local electric and gas, and qualified highway or surface freight transfer facilities, and the list reads like an index of this site's sector pages.

Airports, along with docks and wharves, are not subject to the volume cap, according to the same publication.

Two conditions in that framework reach the reinvestment conversation: Publication 4078 says qualified private activity bonds generally must use 95% or more of net proceeds for the qualified purpose, and the arbitrage rules apply to private activity bonds as well, with differences in the statute.

Whether a given issue carries private activity bond character, and which qualified category it fits, is a determination for bond counsel, and the guide to private activity bonds takes the definition clause by clause.

The sector map at a glance

The table locates each sector on that map and links the guide that covers it.

What the sector changes for the reinvestment desk is therefore concrete: the term an investment can run, the withdrawal provisions it needs, the credit structure and collateral the documents will accept, and which fund's tax clock is running.

For conduit issuers the fee point is not cosmetic, because the IRS notes that fees the conduit issuer charges can raise the effective yield on a conduit loan, which is a purpose investment whose yield section 148 generally limits.

The universe behind the map is large: SIFMA reported U.S. municipal bonds outstanding of $4.5 trillion as of 2Q 2026, up 4.8% year over year, with 2026 issuance through September of $473.8 billion, up 7.3%.

Typical funds and draw profiles

Across sectors the closing produces a similar set of funds, and the draw profile is where the sectors part ways, because a runway, a water plant and a student housing project do not spend on the same calendar.

The funds a sector issue creates

The funds a bond issue creates are fixed by its documents, and sector issues draw from a short shared list.

• A construction or project fund holds the money that builds the asset.
• A debt service reserve fund backstops debt service where the documents require one, sized and invested as those documents provide.
• A capitalized interest fund sets aside bond proceeds to pay interest for a set period, commonly during construction of a revenue-producing project.
• A cost of issuance fund pays the deal's own costs of issuance.
• A rebate fund holds amounts set aside for payments to the U.S. Treasury under the arbitrage rebate rules.
• A refunding escrow holds the investments that pay principal, interest or redemption price on the bonds being refunded.

Which of these an issue contains is fixed by its own documents, and each sector guide maps them in turn.

Draw profiles by project type

A construction-heavy sector, whether airport, water, power or toll, draws against construction milestones, and the draw schedule is the document that turns those milestones into investment terms.

A refunding sits at the other extreme: 26 CFR 1.150-1(d)(1) defines a refunding issue as one whose proceeds pay principal, interest or redemption price on a prior issue, so the escrow's investments are matched to the refunded bonds' payment dates.

Where an issue lends its proceeds rather than building, the draws follow the loans rather than a construction contract, and the housing and conduit guides explain how that changes the term question.

GO capital programs draw against the capital plan, and where a GO issue has no indenture, GFOA places the permitted-investment list in the investment policy.

Those dates are also what the bid specifications and the proposed investment's withdrawal provisions have to encode, and when the draws and the investment stop matching, the spend-down mismatch guide covers the adjustment problem.

Which rules follow the proceeds in every sector?

The federal tax frame attaches to the bonds and their proceeds rather than to the sector, and it starts with the exclusion: section 103(a) excludes interest on state and local bonds from gross income, and section 103(b)(2) withdraws that exclusion from any arbitrage bond within the meaning of section 148.

Section 148's limits run on two tracks, yield restriction and rebate, and the arbitrage guide covers both in detail.

On the policy side, GFOA recommends an investment policy with specific provisions for bond proceeds, so that legal and regulatory requirements are met, fair market value bids are received when required by tax law and state or local laws, and issuer objectives are attained.

The bidding half of that sentence is where a Bidding Agent comes in: the competitive process for a guaranteed investment contract or a repurchase agreement runs on bid specifications and bid comparison work.

Size changes the tax frame for small issuers in any sector: under section 148(f)(4)(D), rebate is treated as met for an issue of a governmental unit with general taxing powers if no bond is a private activity bond, if 95% or more of net proceeds go to the unit's local governmental activities, and if the unit reasonably expects to issue no more than $5 million of tax-exempt governmental bonds in the calendar year.

For bonds attributable to public school facility construction, the statute increases those amounts by the lesser of $10 million or the bonds attributable to that construction, which the Form 8038-T instructions summarize as a $15 million ceiling after 2001, provided no more than $5 million finances non-school purposes.

Those dollar amounts are fixed in the statute rather than indexed, an issuer whose taxing power depends on another unit's approval does not have general taxing power, and the small issuer guide walks through the aggregation and refunding rules in the same subsection.

The instruments carry an eligibility gate of their own: Treasury's SLGS securities may be bought only with an eligible source of funds, which 31 CFR 344.1 defines to include gross proceeds of tax-advantaged bonds and amounts held with them in refunding or defeasance escrows, parity reserve funds or commingled funds, along with other yield-restricted amounts.

Whether a particular fund in a particular deal qualifies is a question for bond counsel, and the SLGS guide covers the mechanics.

State law is the remaining overlay, and it does not travel between states: one state's statute is not authority for another's, which is why the state-by-state guide keeps each state's rules in its own entry.

How does mGIC work across these sectors?

mGIC's work covers these fund types: as an independent municipal advisor and Bidding Agent it helps issuers structure, competitively bid and close investments of bond proceeds in construction funds, reserve funds, debt service funds, escrows and other authorized proceeds.

Its record runs to more than $60 billion in bond proceeds invested and swap notional executed, across more than 1,000 transactions, for issuers in more than 40 states.

The named representative transactions reach across transportation, public power, aviation, water and higher education: Pocahontas Parkway (VA), Grand River Dam Authority (OK), the DHL air cargo hub at CVG, Miami Air Cargo at MIA, Cardinal Stadium in Louisville, the JFK International Air Cargo Center, Delta Cargo at JFK, aircraft FBOs at Westchester County Airport and Hobby Airport, Birmingham Water Works, Prairie State Energy Campus and OSU Village F student housing, each catalogued by name in the transaction index.

For these fund types the sequence runs: review the fund's objectives and permitted investments against the draw schedule, credit terms, market conditions and timing, solicit qualified providers, and compare the bids on rate and on the non-rate terms, the work described in the guide to competitively bidding bond-proceeds investments.

mGIC sells none of the products it evaluates and does not act as principal, and its fee is paid by the winning provider rather than the issuer.

mGIC's priorities are safety first, then liquidity, then yield, as the guide to the three objectives explains.

If you want an independent read on how your sector's fund and draw profile maps to the investments you hold, mGIC offers a free, no-obligation reinvestment review through the contact page.

Determinations about an issue's tax character, its funds and its federal limits belong to bond counsel and tax counsel.

Last updated 2026-10-06.

This page is general educational information about municipal finance and federal and state rules as of the date shown. It is not legal, tax or investment advice, and it is not a recommendation about any particular investment. Product availability, legality and suitability depend on the issuer, jurisdiction, governing documents and transaction-specific facts. Final legal and tax determinations remain with the issuer's bond counsel, tax counsel and other advisors.