Smart Lock ROI Calculator

Does a smart lock pay for itself? This calculator rolls up the big four benefit buckets: rekey avoidance, lockout avoidance, time saved, and theft-risk reduction. Add your one-time and yearly costs, then see your simple payback, breakeven months, and 3-year ROI.

🌎 Niche-aware presets: Tiny House, RV, Van Life, and Off-Grid reflect real-world pain points (frequent rekeys, mobile lockouts, boondocking risk, and “time is battery & peace” value).

Costs

Hardware Cost (USD)

Install Cost (one-time)

Accessories (plates, buck, wiring)

Annual Maintenance ($/yr)

Analysis Horizon (years)

Benefits

Rekeys Avoided (events/yr) Cost per Rekey ($)

Lockouts Avoided (events/yr)

Cost per Lockout ($)

Minutes Saved per Day

$ Value per Hour

Theft Probability Reduction (%/yr)

$ Loss if Theft Occurs

Theft reduction uses expected value: (probability reduction × loss).

Results

Total Upfront Cost	—
Annual Benefits	—
Annual Net (Benefits − Maintenance)	—
Simple Payback	—
Breakeven Months	—
3-Year ROI	—

Enter values or use a preset to begin.

Notes: Payback uses simple (non-discounted) math. 3-year ROI = (total net over horizon ÷ upfront) × 100%. Adjust hourly value to reflect your context (time, hassle, battery/boondocking value).

🔁 Pair this with the Energy Calculator to keep parasitic loads low so your *time saved* doesn’t cost you in battery drain.