Rental Arbitrage Expense Guide: What to Track and How to Deduct

Rental arbitrage is a different animal from owning property. You're leasing a unit long-term, furnishing it, and subletting it on Airbnb or VRBO. The business model works when your nightly revenue exceeds your rent plus operating costs. But the expense profile is completely different from a property owner's, and most accounting tools don't handle it correctly.

This guide covers exactly what expenses arbitrage operators deal with, how they're categorized for taxes, and the mistakes that cost operators money.

How Arbitrage Expenses Differ From Owner Expenses

The fundamental difference: you don't own the property. That changes everything about your tax treatment.

• No mortgage interest deduction (Line 12) -- you don't have a mortgage
• No property tax deduction (Line 17) -- your landlord pays those
• No depreciation on the building (Line 19) -- you don't own it
• Rent paid IS deductible (Line 14) -- this is your biggest expense and it goes here
• Furniture depreciation -- you bought the furniture, so you CAN depreciate it (5-7 years)

Most expense trackers treat all rental operators the same. If your software puts your rent payment on Line 12 (mortgage interest), you're filing incorrectly. That's an audit risk.

The Complete Arbitrage Expense List

Startup Costs (One-Time)

These hit hard in month one but are generally deductible (some must be amortized over 15 years if total startup costs exceed $5,000):

• Security deposit (not deductible -- it's a refundable deposit, not an expense)
• First and last month's rent (deductible as paid)
• Furniture and decor ($3,000-8,000 per unit, depreciate over 5-7 years or Section 179)
• Kitchen setup (cookware, dishes, utensils, appliances)
• Linens and towels (initial purchase)
• Smart lock installation
• Professional photography ($200-500)
• LLC formation and business licenses

Monthly Fixed Costs

• Rent -- your largest expense, typically 40-60% of gross revenue. Deducted on Schedule E Line 14
• Utilities -- electricity, gas, water, internet. Some leases include utilities, some don't
• Insurance -- STR-specific liability insurance ($50-150/month per unit)
• Software subscriptions -- PMS, channel manager, pricing tool, expense tracker
• WiFi -- non-negotiable for Airbnb guests

Per-Stay Variable Costs

• Cleaning -- $80-200 per turnover depending on unit size and market
• Laundry -- if you outsource linen service, $15-30 per set
• Consumables -- toiletries, coffee, paper goods ($5-15 per stay)
• Platform fees -- Airbnb 3% host fee, VRBO variable

Occasional/Maintenance Costs

• Furniture replacement (wear from guests)
• Appliance repair
• Lock replacement or rekeying
• Touch-up paint
• Carpet cleaning or replacement
• Guest damage not covered by platform insurance

Arbitrage Unit Economics Example

Here's what a typical arbitrage unit in a mid-tier market looks like monthly:

That example shows a break-even/slightly negative month, which is common when you factor in cleaning at every turnover. The math only works with high occupancy (85%+) and optimized pricing. This is exactly why tracking every expense matters -- you need to know your true per-unit economics to decide whether to keep or exit a unit.

Common Arbitrage Tax Mistakes

1. Putting rent on Line 12 -- Line 12 is mortgage interest. Rent goes on Line 14. Using the wrong line tells the IRS you own the property when you don't.
2. Deducting the security deposit -- A refundable security deposit is not an expense. It's an asset you'll get back (hopefully). Don't deduct it.
3. Missing furniture depreciation -- You can't deduct building depreciation (you don't own it), but you CAN depreciate the furniture you bought. Many arbitrage operators forget this.
4. Not tracking per-unit P&L -- If one unit is bleeding money, you need to know immediately. Aggregate numbers hide underperformers.
5. Commingling personal and business accounts -- This makes expense tracking a nightmare and is an audit flag. Use a separate bank account and credit card for each unit or at minimum for the business.

How to Track Arbitrage Expenses

The challenge with arbitrage is volume. You might have 5-10 units, each generating 15-20 bookings per month. That's 75-200 cleaning transactions alone, plus utilities, rent payments, supplies, and maintenance. Spreadsheets fall apart fast.

What you need:

• Automatic categorization (so you're not manually sorting 200+ transactions monthly)
• Per-property P&L (to spot underperforming units)
• Arbitrage-specific tax mapping (Line 14 for rent, not Line 12)
• Receipt capture (for cleaning, supplies, and maintenance receipts)
• PMS integration (to pull revenue data automatically)