NYC Operating Costs 2026: What Investors Must Underwrite

The Rent Guidelines Board's 2026 Income & Expense Study is the closest thing NYC has to an audited expense benchmark, built from owners' actual RPIE filings for buildings with rent-stabilized units. The 2026 edition covers 2023–2024 and shows costs still climbing across every major line. We unpacked the full report in our RGB Income & Expense Study breakdown.

Treat these as the floor of an expense-growth assumption, not the forecast. During the 2026 guideline hearings, owner groups told the Board that building costs rose 5.3%, per NY1's coverage of the vote — a full point above the study's citywide average.

Citywide averages hide the volatility inside them. Five lines drive most of the gap between a clean pro forma and the building's first real operating year:

• Insurance — the fastest-moving line in most buildings. Underwrite the renewal quote, not the expiring premium.
• Labor and vendor contracts — supers, porters, elevator service, extermination. These reprice upward at every renewal.
• Fuel and utilities — heaviest where the owner pays heat and hot water, which is most prewar stock.
• Repairs and maintenance — one failed plumbing riser in a prewar building can erase a year of budgeted contingency.
• Property taxes — the largest single line on most NYC statements. Model the assessment trajectory, not a flat carry-forward.

Grow all five at one blended 3% and the model will look smoother than any building actually runs. Line-item growth rates are the discipline.

Expense underwriting matters twice as much when revenue cannot respond. The Board's adopted 2026-27 guidelines (Apartment and Loft Order #58) set renewal increases at 0% for one- and two-year stabilized leases commencing October 1, 2026 through September 30, 2027. The prior order allowed 3% and 4.5%.

For a stabilized or mixed building, the freeze pins the largest revenue line for a full fiscal year. Our owner's guide to the 2026 rent freeze covers the operating mechanics — for underwriting, the takeaway is blunt.

The fastest way to overpay for a stabilized NYC building in 2026 is to underwrite last year's expenses against this year's rents. Operating costs grew 4.2% in the RGB's latest study while regulated renewals froze at 0% — a buyer who models flat expenses and rising regulated revenue is wrong on both sides of the NOI equation.

Out-of-market models treat NYC compliance as a rounding error. It is a real expense line with its own penalty schedule, and it grows with building age and size in ways a national template never captures.

None of these are exotic, and several arrive as capital scopes rather than fees. Map the building's inspection cycles against the hold period before pricing the deal — our compliance checklist for small buildings lays out the full calendar.

Third-party management in Manhattan and Brooklyn runs 4–8% of collected rent for rental buildings, with smaller buildings toward the top of the band. Association pricing runs $75–$150 per unit per month. The full fee structure — lease-up fees included — is in our NYC property management cost breakdown.

A seller's statement showing management far below those ranges usually means an owner-operator was not paying themselves. Re-underwrite the line at market pricing, because your lender will.

The same RGB study found 9.2% of buildings with at least one stabilized unit running negative net operating income. That share is the pool where "motivated seller" listings come from, and it barely moved year over year — down 0.1 percentage point.

Location cuts hard through the averages: the study puts NOI growth at 6.1% in Core Manhattan against 0.9% across the remainder of the city. A distressed basis is only a bargain if the expense structure that created the distress is fixable — insurance and taxes are not.

Never paste citywide growth into a submarket model. The spread between Core Manhattan and everywhere else is wide enough to flip a deal's math on its own.

Before trusting any pro forma this year, run the expense side through six checks:

1. Build from the trailing 12 months of actual operating statements, not the last calendar year. The cost curve is steep enough that stale actuals flatter the deal.
2. Stress insurance, payroll, and vendor renewals at +5–10%. The RGB baseline is the floor, and renewals keep landing above it.
3. Zero out regulated revenue growth through September 30, 2027. Order #58 is not a forecast — it is adopted.
4. Schedule compliance as capital, not contingency. FISP, LL97, LL152, and boiler cycles have dates; put them in the hold-period cash flow.
5. Verify the tax line against the current assessment, not the seller's carry-forward.
6. Re-underwrite management and payroll at market rates, using per-unit numbers a third party would actually charge.

An expense model built this way will kill some deals. That is the point — 2026 is a year to lose on paper instead of at the closing table.