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Compliance

Multi-State Compliance

For businesses creating filing exposure across jurisdictions and needing disciplined state-level coordination.

The problem

A growing footprint creates filing exposure faster than most teams track it. Multi-State Compliance brings discipline to where a business actually owes attention — nexus, apportionment, and the filing footprint — before a state does the work of finding it first.

Who it’s for

Built for a specific kind of decision.

  • Operating companies creating filing exposure across multiple jurisdictions
  • Pass-through owners and businesses with a growing multi-state footprint
  • Finance teams that need state-level positions documented to withstand scrutiny

Scope of work

What the engagement covers.

Nexus exposure

A clear read on where activity creates a filing obligation — before a jurisdiction raises the question.

Filing footprint

The full map of where the business files and why, kept current as the footprint changes.

Apportionment issues

State apportionment positions analyzed and documented so they hold up under review.

Multi-state discipline

A repeatable process for staying ahead of state exposure as the business grows, rather than reacting to notices.

How Fortress works

One method, applied to this work.

The Fortress Hold Method is our way of turning complex tax facts into durable positions — a deliberate, five-step sequence built to hold under audit, professional review, and time.

State work is handled as a maintained position, not a one-time cleanup — monitored as the footprint and the rules change over time.

  1. 01Define the facts
  2. 02Evaluate exposure
  3. 03Build the structure
  4. 04Coordinate execution
  5. 05Monitor change over time

Related insights

Tax Alert

2026 · 7 min

California PTET Extended Through 2030: Missing the June 15 Prepayment No Longer Voids the Election

As California pass-through owners approach the June 15, 2026 prepayment, the calculus has changed. Senate Bill 132, signed by Governor Newsom on June 27, 2025, extends the state's elective pass-through entity tax through the 2030 tax year and removes the all-or-nothing trap that had cost owners their entire election for a single missed or short prepayment. Beginning with tax years that start in 2026, missing or underpaying the mandatory June 15 prepayment no longer voids the election. Instead, it reduces each owner's pass-through entity credit by 12.5 percent of that owner's pro rata share of the amount due but not paid. The forfeiture cliff is gone; the June 15 date is now a cost-benefit decision.

Read insight

Analysis

2026 · 4 min

The SALT Cap Rose to $40,400 — and the Pass-Through Workaround Still Matters

OBBBA raised the state and local tax deduction cap to a $40,000 base, indexed to roughly $40,400 for 2026, with a phase-down for high earners. For some clients that materially loosens a constraint that has bound returns since 2018. But the higher cap phases down above $500,000 of income and reverts to $10,000 in 2030 — and states are extending, not repealing, their pass-through entity tax regimes. The PTET election is still a live planning item for 2026.

Read insight

Analysis

2025 · 5 min

The New SALT Math: A $40,000 Cap, a $500,000 Phase-Out, and Why PTET Elections Still Win

The One Big Beautiful Bill Act raised the state and local tax deduction cap from $10,000 to $40,000 — a fourfold increase that reads, at first, like the end of the SALT-workaround era. It is not. The new cap is temporary, it phases down sharply above $500,000 of income, and it reverts to $10,000 in 2030. Meanwhile, the pass-through entity tax workaround survived the bill fully intact, including for service businesses. For higher-income pass-through owners, the entity-level election is still the durable strategy.

Read insight

Related industries

Sector environments where this work most often changes the answer.

All industries

Start here

Start with the situation, not the multi-state compliance brochure.

We begin by defining the facts and the timeline before recommending scope. If multi-state compliance is the right fit, we will say so — and if it is not, we will say that too.

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A licensed CPA firm with CPAs on staff. Typical first response within one business day.