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Don’t get screwed.</text><text x="58" y="258" font-family="Arial,Helvetica,sans-serif" font-size="30" font-weight="600" fill="#6b5b4d">Leases, TI, NNN &amp; buildouts — negotiated in your favor</text><g transform="translate(1010,86)" fill="none" stroke="#C0531F" stroke-width="9" stroke-linejoin="round"><rect x="20" y="40" width="150" height="130"/><line x1="20" y1="40" x2="95" y2="6"/><line x1="170" y1="40" x2="95" y2="6"/><rect x="50" y="80" width="36" height="36"/><rect x="104" y="80" width="36" height="36"/><rect x="74" y="128" width="42" height="42"/></g></svg>

How Do I Challenge My Property Tax Pass-Through as a Tenant?

Direct Answer

The money move is to make the landlord appeal the assessment — or get the right to do it yourself — and to cap how property taxes flow through to you, because tax pass-throughs are one of the largest and most beatable line items in your CAM. A successful assessment appeal commonly cuts a property's taxes 5–25%, and in over-assessed or post-sale situations even more.

On a building where your pro-rata tax share is $60,000/year, a 15% reduction is $9,000 back in your pocket every year for the rest of the lease — recurring, compounding savings most tenants never pursue because they assume taxes are fixed. They aren't.

Three levers do the work: (1) a lease obligation that the landlord must contest assessments you reasonably request (or grant you the right to appeal in the landlord's name), (2) a "Proposition 13"-style protection so a building sale doesn't reset the assessment and spike your share, and (3) exclusion of new special assessments, betterment districts, and the landlord's income/transfer taxes from the pass-through. The trap is the standard landlord clause that passes through "all taxes and assessments" with no appeal duty, no sale protection, and no exclusions — leaving you to fund every reassessment, special district, and post-sale spike.

Why the Tax Pass-Through Is Beatable

Property assessments are estimates, and estimates are wrong constantly. CBRE and tax-appeal specialists report that a large share of commercial properties are over-assessed because assessors rely on mass-appraisal models, stale comps, or pre-vacancy values. The most common over-assessment triggers:

• A recent sale at a price the assessor anchors to, even though the sale included business value, financing terms, or above-market in-place leases.
• High vacancy or declining rents the assessor hasn't caught up to.
• Capitalization-rate errors — using a low cap rate inflates value; the market may support a higher one that lowers it.
• Incorrect square footage, classification, or comparables.

When the landlord pays taxes and passes them through, the landlord has little incentive to appeal — it's your money, not theirs. That misalignment is exactly what you fix in the lease.

👉 Quick Call with Kory White, Fractional CRO · See Kory on LinkedIn · CRO Syndicate

The Three Lease Clauses That Give You the Right

1. The landlord appeal duty. Target: "Upon Tenant's reasonable written request, Landlord shall contest the assessed valuation of the Property, and any tax savings shall reduce the taxes passed through to Tenant. If Landlord declines, Tenant may pursue the contest in Landlord's name at Tenant's cost, with savings credited to Tenant." This guarantees the appeal happens whether the landlord wants it or not.

2. The Proposition 13 / sale-reassessment protection. In states with acquisition-value assessment (notably California under Proposition 13, and similar dynamics elsewhere), a building sale can reset the assessment to the new, higher purchase price — spiking your tax share through no action of yours.

Negotiate: "Tenant's tax pass-through shall not increase as a result of a change in ownership or reassessment triggered by Landlord's sale or transfer of the Property." This is a major save in markets where a single sale can raise taxes 20–50%.

3. The exclusions list. Carve out from the pass-through: special assessments and improvement-district levies (sidewalks, sewers, business-improvement districts), the landlord's income, franchise, estate, gift, and transfer taxes, and interest or penalties from the landlord's late payment. These are not your operating costs.

Cap and Base-Year the Tax Component

Beyond the right to appeal, control the math:

• Tax cap: fold property taxes into a cap on uncontrollable expenses where the market allows, or cap year-over-year tax pass-through growth.
• Base-year structure: in office leases, taxes (and OPEX) often use a base year — you pay only the *increase* over the base-year amount. Make sure the base year is a fully assessed, fully occupied, post-improvement year, not an artificially low one that inflates every future increase.
• Gross-up the base year so a low-occupancy base year doesn't understate the baseline and overstate your future share.

Run the Appeal Like a Pro

When you trigger an appeal — directly or by pushing the landlord — execute it cleanly:

• Pull the public assessment record and verify the basics: square footage, classification, land vs. Improvement split, and the assessor's stated value.
• Build the value case with recent sales of comparable buildings, the property's actual income (vacancy, in-place rents), and a market-supported cap rate.
• Hire a contingency tax-appeal specialist if the dollars justify it — most work on 25–35% of the first-year savings, so there's no out-of-pocket risk and your downside is zero.
• Mind the deadline. Assessment appeal windows are short and strict — often 30–60 days from the notice or a fixed annual deadline. Calendar it; a missed deadline forfeits a full year.
• Document savings allocation. Make sure any reduction is actually credited to your tax pass-through, not quietly retained by the landlord.

Don't Forget the Reconciliation

Like CAM, the tax pass-through shows up in the annual reconciliation, and that's where to catch errors:

• Confirm the pro-rata share uses total building SF, not leased SF.
• Verify excluded taxes (special assessments, transfer taxes) didn't sneak back in.
• Check that any appeal refund the landlord received was passed back to you for the years you funded.
• Watch for penalties and interest from the landlord's late payment being billed to tenants — those are excludable.

FAQ

Can a tenant appeal a property assessment directly? Often not without lease authority, because the landlord is the property owner of record. That's why you negotiate either a landlord duty to appeal on your request or an explicit tenant right to appeal in the landlord's name at your cost with savings credited to you.

How much can an assessment appeal save? Commonly 5–25% of the property's taxes, more for clearly over-assessed or post-sale-spiked properties. Because the saving recurs every year of the lease, even a modest reduction compounds into real money.

Does a building sale raise my taxes? It can, dramatically, in acquisition-value states like California under Proposition 13 and in any market where a sale resets the assessment to the purchase price. Protect against it with a sale-reassessment exclusion so the landlord's transaction doesn't become your tax increase.

What's a base year and why does it matter? In office leases you often pay only taxes above a base-year amount. A low or under-occupied base year inflates every future increase you owe. Negotiate a fully assessed, grossed-up base year so the baseline is fair.

Sources

• CBRE, "Property Tax Assessment and Appeal Trends" — over-assessment drivers and reduction ranges.
• JLL, "Occupier Tax and Lease Strategy" — tax pass-through and appeal-right negotiation.
• Cushman & Wakefield, "Property Tax Services" — assessment appeal process and contingency fees.
• NAIOP, "Commercial Lease Provisions" — tax pass-through, exclusions, and sale-reassessment language.
• BOMA International, "Operating Expense and Tax Pass-Through Standards" — base-year and gross-up methodology.
• IREM, "Commercial Lease Management" — tax reconciliation and pro-rata allocation.
• Tenant-rep broker guidance, "Challenging Tax Pass-Throughs" — landlord appeal-duty and Proposition 13 protections.