For seven years, the $10,000 SALT cap quietly cost Maryland taxpayers more than almost any other provision in the tax code. The 2025 federal tax law raised the cap to $40,000 — and for Frederick County homeowners, that changes the itemizing math, the value of the PTE election, and how you should time your state tax payments. Here's the full picture.
The SALT deduction lets taxpayers who itemize deduct their state and local taxes on their federal return: Maryland state income tax, county local income tax, real property taxes on your home, and personal property taxes. Before 2018 it was unlimited. The 2017 tax law capped it at $10,000 — a number that hit Maryland harder than most states, because our combined state-and-local income tax alone (up to 5.75% state plus Frederick County's 3.2% top local rate) blows past $10,000 at fairly ordinary professional incomes, before a dollar of property tax is counted.
The One Big Beautiful Bill Act, signed July 4, 2025, changed the math:
| Tax Year | SALT Cap (Married Filing Jointly / Single) |
|---|---|
| 2018 – 2024 | $10,000 |
| 2025 | $40,000 ($20,000 married filing separately) |
| 2026 – 2029 | $40,000, increasing roughly 1% per year |
| 2030 and after | Reverts to $10,000 under current law |
For the details of the broader law, see our One Big Beautiful Bill Act guide. This article focuses on what the SALT change specifically means for Frederick County households and business owners.
Consider a married couple in Urbana: combined income of $250,000, a home with $6,500 in annual property taxes. Their Maryland state and local income tax runs roughly $20,000. Total SALT: about $26,500.
Under the old cap, they deducted $10,000 — losing $16,500 of real taxes paid to a hard ceiling. Under the new cap, they deduct the full $26,500. At their federal bracket, that's roughly $4,000–$5,000 per year in federal tax savings — from a single provision, with no planning required beyond itemizing correctly.
The typical winners in Frederick County: two-income professional households, owners of higher-value homes (property taxes stack on top of income taxes), and retirees with substantial Maryland-taxed income and paid-off homes that still carry meaningful property tax bills.
The $40,000 cap isn't for everyone. For taxpayers with modified adjusted gross income above $500,000, the cap phases down — shrinking by 30% of the income above the threshold — until it lands back at $10,000 (at roughly $600,000 of income). A Frederick physician couple or successful business owner above that range gets little or nothing from the new cap. For them, the entity-level strategies below still do the heavy lifting.
The higher cap changes the itemize-versus-standard-deduction decision for thousands of Maryland households. Under the $10,000 cap, many couples found that capped SALT plus shrinking mortgage interest couldn't beat the large federal standard deduction, so they stopped itemizing. With $25,000–$40,000 of SALT now deductible, adding mortgage interest and charitable giving pushes many of those same households back over the line.
And in Maryland, flipping back to itemizing carries a second, less obvious benefit: Maryland only allows you to itemize on your state return if you itemized federally. Households forced onto the federal standard deduction were also stuck with Maryland's small standard deduction (capped around $2,700 single / $5,450 joint). Returning to federal itemizing unlocks Maryland itemizing too — meaning the new SALT cap can reduce both your federal and your Maryland tax at the same time. Run the comparison both ways before assuming the standard deduction still wins; this is exactly the kind of two-system analysis we covered in our Maryland vs. Federal taxes guide.
Maryland business owners have had a SALT cap workaround since 2020: the pass-through entity election, where the S-Corp or partnership pays Maryland tax at the entity level, creating an uncapped federal business deduction. With the individual cap now at $40,000, is the election obsolete? No — but the analysis changed:
The election is made year by year, so this is an annual numbers decision, not a one-time commitment. We re-run it for every eligible S-Corp and partnership client as part of our annual tax planning.
SALT is deducted in the year paid, not the year it relates to — which creates real planning levers now that the deduction has room to matter:
Plan for 2030 now. Under current law the cap snaps back to $10,000 after 2029. Households and business owners who benefit from the $40,000 window should treat these years as the time to accelerate deductible state taxes, revisit the PTE election calendar, and — for those with flexibility on income timing — recognize income in years when the deduction is biggest. Four good years is a planning horizon, not a permanent state of affairs.
How we handle SALT for clients: every return gets the itemize-versus-standard comparison run on both the federal and Maryland sides, every eligible business owner gets the PTE election re-analyzed annually against the current cap and phase-down, and every December we review whether accelerating the Q4 Maryland estimate or a property tax installment moves the needle. It's unglamorous work that adds up to real money in a high-tax state.
We'll compare itemizing against the standard deduction on both returns, re-test the PTE election, and set up the payment timing — so the new cap actually shows up in your refund. Call (301) 662-6992.
Book a ConsultationPossibly — that's exactly the group that should re-check. If your SALT was capped at $10,000, itemizing may not have beaten the standard deduction before, but with $25,000+ of SALT now countable, adding mortgage interest and charitable gifts flips many Maryland households back to itemizing — which also unlocks Maryland itemized deductions. It's a ten-minute comparison worth doing every year through 2029.
Yes — state and local income taxes paid during the year count, whether through withholding or estimated payments. That's what makes the December-versus-January timing of the Q4 estimate a real deduction lever: the payment is the same either way, but the year it lands in changes.
Largely, yes — the cap phases down by 30% of income above the threshold until it returns to $10,000. But that's precisely the situation where Maryland's PTE election shines: the entity-level tax bypasses the individual cap entirely, at any income level. High earners lost the new cap but kept the better workaround.
Only if the math says so. Prepaying helps when you're itemizing, under your applicable cap, and not in AMT territory — and only where the county actually accepts and applies the payment. Accelerating taxes past the cap accomplishes nothing, so this is a calculation, not a blanket year-end tip.
By Roy Cogliandolo, CPA · Mercer Flanagan · March 17, 2026
This article is general information, not tax or legal advice. Cap amounts, phase-down thresholds, and sunset dates reflect current law as of early 2026 and are subject to change — verify your specific situation with a qualified professional before acting.