Formulas and sources
Each formula this calculator uses, where it comes from, and what it leaves out. "How it works" shows the same formula with your own numbers.
Return on investment
Simple and Team modes
- ROI
- return on investment, as a percentage
- NS
- yearly net savings: the yearly value of the time saved minus the yearly AI cost
- AI Cost
- the yearly AI cost, every seat included in Team mode
Plan prices in the AI Cost presets are each provider’s own list price; the date each was read and a link are beside the preset. This panel carries no prices or wages.
Source: Standard formula; no single publisher.
Yearly net savings
Team mode
- NS
- the yearly net savings
- Hours Saved
- hours each person saves in a week
- Hourly Rate
- the hourly pay of the people using the tool
- Employees
- how many people use the tool
- Yearly AI Cost
- from the formula below
Simple mode counts the same way for one person. A year is 52 weeks with the same hours each week and no allowance for leave or holidays.
Source: Standard formula; no single publisher. The 52 weeks match the full-time year of 2,080 hours (40 × 52) that BLS uses to turn an hourly wage into a yearly one [1].
Yearly AI cost
Team mode, billed monthly, per person
- Yearly AI Cost
- the AI cost for a year
- AI Cost
- the price you enter, for one person per month
- Employees
- the seats billed
Billed yearly, the price is for a year, so “× 12 months” becomes “× 1 year”. As One team bill, the cost is counted once, so “× Employees” drops. Simple mode counts one seat.
Source: Standard formula; no single publisher.
Payback period
Simple and Team modes
- Payback (weeks)
- the payback period
- Yearly AI Cost
- one year of the AI cost
- Yearly Savings
- the yearly value of the time saved, before the AI cost
Weeks of savings needed to match a year of AI cost; no one-time set-up cost is modelled. Shown only when the savings exceed the cost, and on the result card below 104 weeks. Payback in months, in Copy and Export, counts a month as 52 ÷ 12 weeks.
Source: Standard formula; no single publisher.
Conservative and Optimistic scenarios
Simple and Team modes
- Scenario ROI
- the ROI of the scenario
- Share
- 70% for Conservative, 100% for Base Case, 130% for Optimistic
- Yearly Savings
- the yearly value of the time saved
- Yearly AI Cost
- one year of the AI cost
Source: CalcTrail’s own shares; no publisher.
Role benchmark figures
Team mode
Hourly rates are BLS mean hourly wages for the occupation named in the benchmark box, May 2025, rounded to the dollar. Hours saved come from a published survey where one gives a figure for the role. HubSpot’s and Zendesk’s figures are vendor-reported and shown in the box with their caveats; the other roles use CalcTrail’s own example hours, and every team size is an example.
Source: Wages: BLS, Table 1 [1]. Hours saved: McKinsey, for software teams that use AI for refactoring, modernization and testing [2], and Thomson Reuters, a forecast for legal professionals [3].
Sources
- U.S. Bureau of Labor Statistics. Occupational Employment and Wages, May 2025 (USDL-26-0725), Table 1, "Mean wages, Hourly", its footnote 1, and the Technical Note. Released May 15, 2026.
- McKinsey & Company. Unlocking the value of AI in software development. November 3, 2025.
- Thomson Reuters. Future of Professionals Report 2025. June 26, 2025.
What this calculator does not cover
- The hourly rate is a wage. BLS wages exclude employer-paid benefits, overtime and shift pay, so the full cost of an hour is higher.
- A BLS mean wage is the average for the occupation across all US industries; it says nothing about your own staff.
- Hours saved are an estimate you enter. The surveys behind the benchmarks are self-reported, forecast or vendor-reported, and none gives hours for every role.
- One-time implementation or training costs and revenue gained are not included.
- Plan prices are list prices on the date shown; discounts, taxes and extra seats or usage are not included.
Sources checked on .