Daperis CPAChoosing S-Corp and Making It Work: A PTET Case Study
The situation
A recently retired New York City professional, with a background in cybersecurity, decided to start consulting for some extra income. Before any tax question came up, there was a more basic one: what entity should this even be?
The problem
As a single owner, the client had three real options: sole proprietorship, S-Corp, or C-corp. C-corp was ruled out quickly. It rarely makes sense for a solo consultant, and it didn't here either.
The real decision was between sole proprietorship and S-Corp, and in New York City that decision is harder than it looks. Sole proprietors face the city's Unincorporated Business Tax. S-Corps face the city's General Corporation Tax at 8.85% on income allocated to the city, on top of the personal tax the owner pays on their own K-1 income. That represents significant NYC-specific tax exposure stacked on top of federal and state taxes. For most S-Corp owners in the city, the payroll tax savings an S-Corp is supposed to deliver is often offset by the 8.85% GCT, which is significantly higher than the 4% Unincorporated Business Tax (UBT) sole proprietors pay before it ever shows up as a benefit.
Layered on top of that was a separate question: PTET. New York's pass-through entity tax election lets eligible entities pay state (and, separately, city) income tax via distinct elections at the entity level instead of the owner paying it personally. Done right, it turns a state tax bill that would otherwise be squeezed by the federal cap on itemized state and local tax deductions into a full federal business deduction instead. But PTET isn't available to a single-member LLC taxed as a sole proprietor. To access it, the client needed to be taxed as a corporation or a partnership. Since a C-Corp didn't make sense and they weren't eligible to be taxed as a partnership, the entity choice narrowed to a sole proprietorship versus an S-Corp. This meant the entity choice and the PTET question were inextricably linked. What strategy would result in the lowest overall tax liability when factoring in Federal, State and Local taxes?
What we did
We modeled the full tax picture under both structures: federal income tax, self-employment tax versus payroll tax and Social Security, and New York City's UBT versus GCT, side by side. We walked through what each option actually meant day to day: sole prop reporting on Schedule C with no payroll to run, versus S-Corp formalities and running a W-2.
The detail that made this client's numbers work where they don't for most NYC S-Corp owners: not all of his business income was sourced to New York City. Because NYC's GCT only applies to the portion of income apportioned to the city, the fact that less than 100% of his income was sourced to NYC meant a smaller portion was exposed to that 8.85% rate. That single fact changed the analysis. It's also why "S-Corp doesn't make sense in NYC," while true as a general rule, isn't automatically true for every business. It depends on where the income is actually sourced amongst other factors.
With the S-Corp structure penciling out, electing PTET was the next step, letting him pay his state income tax at the entity level and take it as a federal business deduction instead of running into the personal deduction limits he'd otherwise hit. He still paid personal New York City resident tax, since he lived in the city. But the GCT exposure that usually sinks the S-Corp math for New York City consultants was smaller than usual, and that made the whole structure work in his favor.
The result
An entity structure the client understood inside and out, real federal tax savings through the PTET election, and a setup that made sense for his specific business, not just the generic advice that gets handed to every solo NYC consultant.
Keep It Simple / Key Takeaway 🍕
"S-Corp doesn't work in NYC" is a decent rule of thumb, not a law of physics. Where your income is actually sourced can flip the math entirely. Before ruling a structure out based on a generic rule, run your specific numbers.
Client details have been changed to protect confidentiality. Some of these case studies are composites drawn from more than one engagement. Every situation is different, and the results described here are not a guarantee of similar outcomes.