What Rent PSF means in CRE underwriting, how to calculate it, and why it matters for lease comparisons and loan underwriting.
Rent per square foot, often abbreviated as Rent PSF, is a common leasing metric that expresses lease payments on a per-square-foot basis over a defined period, usually per year. Calculated by dividing annual rent by the space’s rentable or usable square footage, Rent PSF facilitates comparisons across suites, buildings, and markets. In CRE lending, underwriters rely on Rent PSF to benchmark asking rents, estimate market lease-up scenarios, and compute effective rents after concessions. Consistent measurement—rentable versus usable—ensures accurate revenue projections and realistic valuation inputs for loan sizing.
When assembling underwriting assumptions or lease comparables, calculate Rent PSF using the same area definition and contract period for all properties to maintain apples-to-apples comparisons. Convert monthly rents to annualized amounts and include tenant reimbursements or operating expense pass-throughs separately so the Rent PSF reflects base rent only, unless analyzing full-service gross rents. Lenders evaluate Rent PSF trends against market comps and historical performance to justify assumed face rents, vacancy recovery timing, and rent escalations that feed into pro forma revenue used to determine debt capacity.
Rent PSF is a concise, standardized tool for comparing rent levels and revenue potential across properties and lease types, helping lenders and sponsors validate market assumptions. Accurate Rent PSF supports realistic pro formas, effective rent calculations after concessions, and sensitivity analysis for underwriting vacancy and renewal scenarios. Misusing rentable versus usable measurements or failing to separate base rent from reimbursable charges can lead to inflated revenue forecasts, poor loan sizing, and unexpected cash shortfalls, so precision in Rent PSF calculations is critical to reliable underwriting and asset valuation.