Security Deposit Opportunity Cost Calculator

For a 1-2 year tenancy, modest. A $2,500 deposit at 5% HYSA over 2 years = ~$260 lost. Over a longer 5-year tenancy, that grows to ~$700. Not life-changing, but real. For luxury rentals with $10K+ deposits, the loss is substantial — consider negotiating reduced deposit or surety bond alternative.

NY (6+ unit buildings), NJ, MA, CT, MD, DC, and Chicago/IL via RLTO. Most other states do not. Check your state law — NJ requires landlord to pay actual interest earned; MA requires 5% per year or actual rate; DC tracks Federal Reserve rate. Always request interest annually if applicable.

Mixed. Companies like Rhino, Jetty, LeaseLock charge ~$15-30/month instead of upfront $2K-5K deposit. Over 2 years, you pay $360-720 vs. losing ~$200-400 in deposit opportunity cost. Worth it if you need the cash for other purposes; expensive if you would have just left it in HYSA. Read fine print — many products have additional fees and limited coverage.

Only in states with the requirement (above list). In states without, landlord keeps any earned interest. Some leases voluntarily promise interest — read your lease agreement. If your state requires it, send a written demand annually with the rate calculation; failure to pay can lead to court enforcement.

(1) Negotiate a smaller deposit — possible in soft markets. (2) Use a surety bond product if alternative use exists for the cash. (3) Request a rental concession (free month) instead of deposit reduction. (4) In states with interest requirements, hold landlord accountable. (5) Use the deposit time productively — review investment alternatives ahead of move-out.

No — security deposits are not tax-deductible because they're refundable. Only when forfeited (used for unpaid rent, damage, etc.) might portions become deductible to your landlord (as compensation income) or deductible to you (as part of rental expenses for business renters).

Lost interest in HYSA at 5% APY: about $310 over 2 years. State-required landlord interest at 1.5%: about $90. Net opportunity cost: ~$220. Lost real return after inflation: more, because you're also losing inflation-protection. Most renters don't think about this — but it's real money over multi-year tenancies.

Some leases allow this in lieu of deposit. Mathematically equivalent in most cases. Difference: prepaid rent isn't refundable if you move early; deposit is refundable. Prepaying rent makes sense only if it's the only way to get the apartment (e.g., poor credit) — otherwise traditional deposit is more flexible.