What does a warehouse robot ROI calculation include?
An AMR ROI calculation compares the cost of picking your orders by hand today with the cost of picking the same orders with autonomous mobile robots (AMRs): the picker hours you save, the staff hours the robots add, the money you spend once and every year, and how long it takes to get the investment back.
The calculator works it out in three steps: manual picking labor today, the same volume with robots, bought or rented as a service (RaaS), and the cash flow over up to ten years with payback and net present value (NPV).
Why start with order picking?
- Picking is the biggest labor cost in most warehouses: a widely cited review in the European Journal of Operational Research estimates order picking at up to 55% of warehouse operating expense.
- Walking is the biggest part of picking: the same review shows travel as the dominant part of a picker's time. Robots that bring totes to pickers, or goods to a station, cut that walking.
- Gulf warehouses are automating: in Riyadh, Starlinks opened a fulfillment center with more than 250 Geek+ robots in January 2023, and Saudi Post (SPL) signed for 200 sorting robots in January 2024.
- Labor costs differ by country: payback depends on your own wage, housing and visa costs, which is why every amount here is an input.
What inputs do you need?
| Input | Where to find it | Tip |
|---|---|---|
| Lines per day and operating days | Warehouse management system (WMS) reports | Run an average day, then a peak day such as White Friday or Ramadan. |
| Lines per paid picker-hour today | WMS lines ÷ paid hours from payroll or the agency invoice | Use paid hours, not scanner log-in time. |
| Fully loaded cost per picker | Payroll, HR and agency contracts | Include housing, transport, visa and residence fees, insurance and end-of-service. |
| Lines per hour with robots | A pilot on your SKUs, or the vendor's reference sites | Ask the vendor for site data, not a marketing multiple. |
| Robot count and prices | Vendor proposals | Ask for both a purchase price and a RaaS fee for the same scope. |
| Integration and site works | Vendor, integrator and your IT team | Integration with the WMS is often the cost buyers underestimate. |
How is the ROI calculated?
Manual picking today
The same volume with robots
Payback and net present value
Payback shows how fast the money comes back but ignores what happens after it and the time value of money, so the calculator also gives the NPV at your discount rate. With RaaS the up-front cost is small, so payback is short; compare the NPV of the two options over the same years to see which costs less overall.
Sources
- R. de Koster, T. Le-Duc and K. J. Roodbergen, Design and control of warehouse order picking: a literature review, European Journal of Operational Research 182(2), 2007, pp. 481–501 (order picking up to 55% of warehouse operating expense; travel as the dominant part of picker time). Source: Erasmus University.
- Locus Robotics, The true ROI of autonomous mobile robots, 16 December 2025 (cost items: hardware, infrastructure, software, RaaS, maintenance and support, WMS integration; a baseline before go-live and checks at 30, 90 and 180 days). Source: Locus Robotics.
- Corporate Finance Institute, Payback period (updated 13 May 2026) and Net present value (updated 19 October 2026). Source: CFI payback, CFI NPV.
- Gulf examples: Logistics Manager, 6 February 2023 (Starlinks and Geek+, Riyadh); GDN Online, 29 January 2024 (SPL, IQ Robotics and Alkhereiji Group, 200 robots). Source: Logistics Manager, GDN Online. Last reviewed 21 October 2026.
Worked example: 40,000 lines a day with 40 robots
The defaults are examples, not vendor prices or wages; replace them with your own figures.
- At 70 lines per paid hour, 40,000 lines take 571 picker-hours a day. At $1,500 a month for 208 paid hours ($7.21 an hour) and 360 days, picking costs $1,483,516 a year, or $0.103 a line, with about 82 pickers.
- With robots at 140 lines an hour, the same lines take 286 hours, plus 16 hours of fleet supervision: 302 hours, 270 hours a day less (47%). Labor falls to $783,297, a saving of $700,220 a year.
- Buying 40 robots at $30,000 with $150,000 of one-time cost needs $1,350,000. Software, support and maintenance at $4,000 a robot leave a net saving of $540,220 a year.
- Payback comes in 30 months. Over 5 years at 8%, the NPV is $806,941 and the return is 100%.
- RaaS at $1,200 a robot a month costs $576,000 a year, leaving $124,220. Payback is about 6 months on $60,000 of setup, but the 5-year NPV is $435,974: in this example, buying costs less over five years, and RaaS keeps the cash and the option to scale down.
How to read your results
- Payback longer than the robot's life or the contract: the project does not pay for itself on picking labor alone. Check the other gains you can measure, such as fewer errors or no peak hiring.
- Short payback, low NPV: common with RaaS. The fee keeps running, so compare the NPV of buying and renting over the same years.
- Staff hours the robots add: if they eat a large part of the saving, the robot count or the process needs another look.
- Cost per line: the cleanest figure to compare manual picking, buying and RaaS, and to track after go-live.
Before you sign
- Measure a baseline: record lines per paid hour and cost per line for several months before go-live, then compare at 30, 90 and 180 days.
- Run a pilot on your SKUs: the pick rate with robots drives the result more than any other input.
- Size the fleet for your peak: work out robots and chargers with the Robot Fleet Size & Charging Calculator.
- Price the whole order cost: picking is one part; the Delivery Cost per Order Calculator covers the van or truck that takes the order to the customer.
- Put the same scope in every quote: integration, site works, spare parts, support hours and service levels, so purchase and RaaS offers compare like for like.
Assumptions and limits
The calculator counts labor and robot costs only. It does not value fewer picking errors, faster dispatch, safety, floor space or the ability to handle a peak without temporary staff; add those yourself if you can measure them. Robot running costs and RaaS fees stay flat over the years, and volume growth assumes the same robots can handle it. Taxes, financing, depreciation and inflation other than the labor cost rise you enter are not modeled. All defaults are examples, not vendor prices or market wages. Use the result to plan and compare offers, then confirm it with a pilot and the vendor's quote.