US TAX DESKThe problem PTET solves
Since 2017, individuals have faced a ceiling on how much state and local tax (SALT) they can deduct on their federal return. Before that, the deduction was unlimited.
For most people that cap is an annoyance. For the owner of a profitable pass-through business in a high-tax state, it is expensive. Their share of business profit can run into seven figures, generating a state tax bill far above the cap — and the excess simply isn't deductible federally.
Meanwhile, a C corporation in the same state deducts its state income tax in full, as an ordinary business expense, with no cap at all.
That asymmetry — same economic cost, different federal treatment, purely because of legal form — is what PTET regimes were designed to correct.
How the election works
The mechanics are simple once you see them:
- Without PTET. The partnership earns profit. It pays no entity-level tax. Profit passes through to the owners, who each pay state income tax personally. That personal payment runs into the SALT cap.
- With PTET. The partnership elects to pay the state income tax itself, at the entity level. That payment is a business expense, fully deductible on the federal partnership return — no cap. The reduced profit then flows through to owners. The state gives the owners a credit (or an exclusion) so the same income is not taxed twice at state level.
Net effect: the same dollars of state tax get paid, but the federal deduction survives intact.
Why it is more valuable than it first appears
The uncapped deduction is the headline benefit, but PTET carries two further advantages:
- It reduces flow-through income. Because the entity pays the tax before allocating profit, the income reported to owners is lower — which in appropriate cases also reduces self-employment tax exposure for active principals. State tax paid personally never does that.
- It can reduce alternative minimum tax exposure, since the deduction moves off the personal return entirely.
For a partner in a large fund whose share of state taxes runs well into six or seven figures, the difference between a capped personal deduction and an unlimited entity-level one is substantial.
Is it legitimate?
Yes. This is not an aggressive shelter. State legislatures enacted PTET regimes deliberately, and the Treasury Department blessed the approach in guidance issued in 2020. The large majority of states with an income tax now offer it, and elections are routine for pass-through businesses of any scale.
That said, it remains genuinely contested as policy:
Defenders argue it restores parity between business forms — a partnership and a corporation earning identical profits in the same state should bear comparable federal tax on their state tax payments. They also invoke federalism: states are entitled to structure their own taxes.
Critics argue it quietly nullifies a cap Congress deliberately enacted, erodes federal revenue, and creates a two-tier system — business owners get an uncapped deduction while ordinary wage earners in the same state remain capped.
Practical points
- It's an election, not automatic. Someone must actively make it, and deadlines vary by state.
- Rules differ meaningfully between states, particularly on nonresident owners, tiered partnerships, and election timing. Multistate businesses need to map this carefully.
- It doesn't suit everyone. The benefit depends on the owners' personal tax positions; in some cases the credit mechanics leave owners worse off.
What to watch
The federal SALT cap is scheduled to change again before the end of the decade, and proposals to restrict PTET for certain service businesses have come close to enactment before. Any revival of that restriction would land hardest on investment managers, law and accounting firms.
Related reading
This explainer is analysis and general information, not tax, legal or investment advice.