The Strangest Loopholes: The Oddest Legal Ways Millionaires Pay Less Tax
The Million Dollar Question: Which of these ten odd tax breaks did Congress actually shut down?
A) The Augusta Rule (14-day home rental) B) Three-year racehorse depreciation C) The art like-kind exchange D) Puerto Rico’s Act 60Read on for the answer.
Every one of the ten provisions below is real, and all but one are still on the books. This isn’t carried interest or the SALT cap — the loopholes everyone already half-knows. These are stranger, more specific, and in most cases written into the tax code on purpose, by name, for a purpose Congress could defend out loud.
What it is
A “loophole” implies an accident — a gap nobody meant to leave open. Most of what follows isn’t that. It’s a catalog of provisions that read like accidents to an outsider but were deliberate incentives to the people who wrote them: a carve-out for horse breeders, a tool for real estate developers, a retirement account rule nobody imagined a founder would use to shelter a fortune. A couple are genuinely contested — conservation easements and private placement life insurance have both drawn federal investigations for the way they’ve been stretched past their original intent. One — the art like-kind exchange — is dead law that people still ask about. The common thread isn’t secrecy; it’s specificity. Each rule was built for one situation, and each has been adapted by wealthy taxpayers into something its authors may not have fully anticipated.
1. The Augusta Rule. Rent your own home to your own business for up to 14 days a year, and the rental income is entirely tax-free to you personally — while the business deducts the rent as an ordinary expense. It’s Section 280A(g) of the tax code, and the ceiling is absolute: rent it for a 15th day and the exclusion disappears for the entire year’s income, not just the overage.
2. Conservation easements on golf courses. A landowner donates the development rights on a property — often, specifically, a golf course — to a land trust or municipality, and claims a charitable deduction for the appraised value of what was given up. The core idea is legitimate: America has genuinely preserved land this way. The abuse is in the appraisal. ProPublica has reported that the average deduction on the roughly two dozen golf-course easements currently under audit runs about $19 million, with individual transactions exceeding $50 million, and roughly 10% of all easements nationwide are tied to golf courses. One widely reported example: the 300-acre Blue Monster course at Trump National Doral, whose development rights were donated to the City of Doral in 2022.
3. Bonus depreciation on private jets. Buy a jet, use it more than 50% for business, and write off the entire purchase price in the year you place it in service — a $10 million aircraft becomes a $10 million deduction. The 2025 One Big Beautiful Bill Act made 100% first-year bonus depreciation permanent for qualifying aircraft placed in service on or after January 20, 2025 — no more looming phase-out deadline.
4. Racehorse depreciation. A racehorse can be depreciated over three years instead of the standard seven, using the 200% declining-balance method — so a $500,000 yearling generates most of its deduction in its first couple of years of racing, before it’s even proven itself at the track. What used to require periodic renewal was made permanent for all racehorses regardless of age, retroactive to horses placed in service after December 31, 2022.
5. Buy, borrow, die. The best-known of the group, and arguably the most consequential. Instead of selling appreciated stock and paying capital-gains tax, a wealthy household borrows against it through a securities-backed line of credit — banks will typically lend 50–90% of portfolio value — spends the loan proceeds tax-free (loans aren’t income), and holds the stock until death. Heirs then inherit it at a stepped-up cost basis equal to its value on the date of death, erasing every dollar of gain that built up during the original owner’s lifetime.
6. Private placement life insurance (PPLI). A variable life insurance policy, sold only to wealthy investors, that wraps around tax-inefficient investments like hedge funds. Growth inside the policy isn’t taxed as it accrues, and the death benefit generally passes to heirs free of income tax. A February 2024 Senate Finance Committee investigation led by Sen. Ron Wyden found roughly $40 billion held in PPLI policies across about 3,000 Americans, with an average face amount near $13 million — and identified real gaps in the IRS’s ability to enforce the “investor control” rules meant to prevent exactly this use.
7. Opportunity Zones. Invest capital gains into a Qualified Opportunity Fund that develops in a designated low-income area, and you get a rolling deferral on the original gain plus a full exclusion of any new gains earned inside the fund if held ten years. The 2025 tax law made the program permanent and restructured it into rolling five-year windows, though it trimmed one of the original sweeteners — the extra basis step-up that used to apply at year seven.
8. Puerto Rico’s Act 60. Move to Puerto Rico, become a bona fide resident (passing the physical-presence, tax-home, and closer-connection tests), and pay a 0% Puerto Rico tax rate on capital gains, interest, and dividends earned after you relocate — under a signed decree valid for 15 years. It’s genuinely narrow: gains that accrued before the move are still taxed at ordinary U.S. rates, and recent legislation (Act 38-2026) has already begun tightening terms for new applicants while extending the program’s sunset to 2055.
9. 1031 exchanges. Sell an investment property and roll the proceeds into another “like-kind” property, and the capital-gains tax on the sale is deferred rather than triggered. It’s the oldest and most mainstream item on this list, and despite years of proposals to cap it, Section 1031 came through the 2025 tax overhaul untouched — real estate investors at every wealth tier still use it routinely.
10. Roth conversions of pre-IPO stock. Contribute founder-priced shares of a private company to a Roth IRA while they’re still worth almost nothing, and every dollar of growth from that point forward compounds tax-free — no capital-gains tax on the sale, no tax on withdrawal in retirement. The best-documented case is Peter Thiel’s: according to ProPublica’s reporting on IRS records, Thiel opened a Roth IRA in 1999 and bought 1.7 million founder shares of PayPal at $0.001 each for $1,700; by 2021, ProPublica reported the account held more than $5 billion.
Who uses it
Wealth level determines which of these are even reachable. The Augusta Rule and Roth contributions are available to anyone who owns a small business or has earned income — they just happen to compound spectacularly at the top end. Racehorse and jet depreciation require an actual business generating enough income to make the deduction useful, typically $5M–$100M households with an active operating company behind the purchase. Conservation easements and PPLI scale to $10M–$100M+ households and the family offices that serve them, where the dollar amounts justify the structuring and legal cost. Puerto Rico’s Act 60 is really only rational for households with $10M or more in unrealized gains they’re willing to relocate to capture — the cost of actually moving and maintaining bona fide residency isn’t trivial. Buy-borrow-die and founder-stock Roth conversions are functionally reserved for $100M+ households and founders with access to pre-IPO equity in the first place.
The split isn’t only about dollar thresholds — it’s about who has the kind of asset each provision rewards. A salaried executive with $20M in vested stock options has no racehorse to depreciate, no golf course to place an easement on, and no pre-IPO shares cheap enough to be worth converting into a Roth. These provisions cluster disproportionately around business owners, real estate investors, and founders precisely because those are the profiles that generate the specific asset types — active depreciable property, appreciated illiquid real estate, or founder-priced equity — that each rule was written to touch.
Why they use it
Some of these are used because they’re simply available — the Augusta Rule and a standard Roth IRA cost nothing extra to set up and require no promoter, no fund, no decree. Others are industrial-scale operations built specifically to be sold: syndicated conservation easements and PPLI both attracted promoters who packaged the strategy and marketed it to wealthy clients for a fee, which is precisely what drew federal scrutiny to both. The rest sit in between — real incentives Congress wrote to encourage a behavior (developing distressed real estate, breeding racehorses, buying American-made business jets) that happen to be worth vastly more to someone paying tax at the top marginal rate than to someone who isn’t.
How it works
The mechanics vary more than the headlines suggest. Some are timing tools: bonus depreciation and racehorse depreciation don’t eliminate tax, they accelerate a deduction into year one that would otherwise have arrived over five or seven years — valuable because a dollar of tax saved today is worth more than the same dollar saved gradually. Others are exclusion tools: the Augusta Rule and Puerto Rico’s Act 60 don’t defer income, they remove it from the tax base entirely, provided a narrow condition (14 days, bona fide residency) is met exactly. Buy-borrow-die and the Roth conversion are basis tools — one erases embedded gain at death via stepped-up basis, the other prevents gain from ever being taxed by placing the asset inside a Roth wrapper before it appreciates. Conservation easements and 1031 exchanges are valuation and deferral tools tied to real property. PPLI combines a legitimate insurance wrapper with underlying hedge-fund exposure that would otherwise generate a tax bill every year.
What it costs
None of these are expensive to execute relative to what they save. A conservation easement historically returned a deduction worth several multiples of the cash actually invested in the transaction — which is exactly the ratio that drew IRS attention. PPLI carries wrapper and insurance-load fees, but on a policy averaging roughly $13 million in face value, those costs are a rounding error against the tax otherwise owed on the underlying investment gains. A Puerto Rico Act 60 decree costs a $5,000 filing fee — trivial next to the actual cost of relocating a household and business. The Augusta Rule and a Roth conversion cost nothing beyond ordinary accounting. At every scale, the dollar cost of using the provision is a small fraction of the dollar amount of tax it avoids or defers — which is the entire reason these rules attract more attention as the underlying wealth involved gets larger.
Hidden costs and tradeoffs
The audit and legislative risk is real and uneven. Syndicated conservation easements have been repeatedly struck down in Tax Court, with courts often allowing only a fraction of the claimed deduction, and two promoters have received prison sentences. PPLI carries “investor control” risk — the IRS can disqualify a policy’s tax treatment entirely if the policyholder is found to be directing the underlying investments too closely, and Sen. Wyden’s 2026 bill aims to tighten that rule further. Puerto Rico’s bona fide-residency test is a genuine, ongoing burden: 183 days physically present, a closer-connection test, and continuous compliance for the life of the 15-year decree — not a paperwork exercise that ends once. Opportunity Zone terms already changed once in the 2025 overhaul, trimming a benefit investors had planned around. None of these strategies is “set and forget”; each carries a live risk that the rule changes, or that its use is judged to have gone further than intended.
There’s also a coordination cost that rarely shows up in the marketing materials. A PPLI policy, a Puerto Rico decree, and a syndicated easement each require ongoing professional oversight — insurance actuaries, immigration and tax counsel, appraisers — for years or decades after the initial transaction closes. That overhead is invisible in the “how much did it save” math but very real in the “how much does it take to keep working” math, and it’s one reason these structures cluster around family offices built to manage exactly this kind of standing complexity rather than a one-time filing.
What people get wrong
The biggest misconception is that any of this is hidden or illegal. Nearly everything above is public: the statutes are numbered, the Senate investigations are published, the IRS’s own guidance describes the provisions in detail. What’s actually happening is closer to arbitrage between a rule’s stated purpose and its practical reach — Congress meant to help land conservation, horse breeding, or distressed real estate, and wealthy taxpayers with the right assets and advisors found the versions of those rules worth the most. The second misconception is treating “loophole” as synonymous with “still open.” Nine of these ten provisions are alive and, in several cases, were strengthened by the 2025 tax overhaul. One of them — swapping one piece of art for another and deferring the gain — is not. It ended with the 2017 Tax Cuts and Jobs Act, which limited like-kind exchange treatment to real estate only, closing it off for art, cars, equipment, and every other form of personal property. Collectors who still ask about it are asking about a law that hasn’t existed since January 1, 2018.
A third misconception is assuming these strategies are interchangeable — that a household using one is using all of them. In practice they’re highly specific to circumstance: a family with a working cattle ranch has no use for a founder-stock Roth conversion, and a tech founder two years from an IPO has no reason to buy a racehorse. What links the ten isn’t a shared playbook; it’s that each was written into the code for a narrow purpose and each has since attracted exactly the taxpayers positioned to use it at scale.
Bottom line
Final Answer: C — the art like-kind exchange. Everything else on this list survived, and several items were made permanent or expanded in 2025’s One Big Beautiful Bill Act: bonus depreciation on jets, three-year racehorse depreciation, and the Opportunity Zone program itself. The art exchange is the exception, and it’s instructive precisely because it is one: Congress can and occasionally does close a provision like this, which means the survival of the other nine isn’t an oversight — it’s evidence that lawmakers have looked at each of them and, so far, left them standing.
Related reading: Taxes: How Wealth Is Structured and Preserved · Carried Interest: The Most Defended Loophole in American Tax · The Tax-Alpha Industry: The $1 Trillion Business of Manufacturing Deductions · The Depreciation Machine: Why a $12.5B Sports Team Is a Tax Shelter · Borrowing Against Wealth: Why the Rich Often Use Debt
