Free Custom Software ROI Calculator — Justify Your Software Investment
Custom software ROI is calculated by comparing the cost of the manual process being replaced (labor hours × hourly cost × frequency) against the development and ongoing maintenance cost of the software. This calculator produces a payback period and 5-year net savings, giving you the data to justify the investment to stakeholders.
saas
Calculate payback period and 5-year ROI for a custom software investment.
- Annual savings from automating a manual process
- Payback period in months
- 5-year net savings
- 5-year ROI percentage
- Year-by-year cumulative comparison
- Client-side only — nothing is uploaded
Everything you need in one Custom Software ROI Calculator
Manual vs software cost
Values the labor the process consumes today against the build and maintenance cost — the comparison that justifies any software project.
Payback period
Shows how many months of savings it takes to recover the development cost — the number finance teams ask for first.
5-year ROI
Projects net savings and ROI over five years, so a one-time build cost is weighed against its full multi-year return.
Year-by-year view
A cumulative table shows exactly when the investment turns net-positive, not just a single end figure.
How to use Custom Software ROI Calculator
Enter manual process cost
Input hours spent per week on the manual process, number of people doing it, and average hourly cost.
Enter software cost
Add development cost, monthly hosting/maintenance, and any ongoing licences.
See ROI
The calculator shows annual savings, payback period, and 5-year net ROI percentage.
What goes into a software ROI analysis
| Side | What to include |
|---|---|
| Costs | Development, hosting, maintenance, future features, training, change management |
| Hard benefits | Labor hours saved, overtime avoided, fewer hires needed |
| Soft benefits | Fewer errors, faster turnaround, better data, happier staff |
| Key metrics | Payback period, multi-year net savings, ROI percentage |
How to fix common syntax errors
Most “invalid JSON” failures come from a small set of mistakes. Paste the failing JSON above, click Validate, and the tool points you at the exact line and column.
Manual process uses salary; software ROI uses fully-loaded costUse the same cost basis throughout. Fully-loaded cost (salary + benefits + overhead, typically 1.3–1.5× salary) is more accurate for CFO-facing analysis.
ROI model shows development cost only, no ongoing maintenanceAdd annual maintenance at 15–20% of build cost. A $200K system costs $30–40K/year to maintain — over 5 years that's $150–200K additional, doubling the TCO.
10 hours/week saved × $50/hr = $26K/year in savingsSaved hours only convert to cash if headcount is reduced. If employees reallocate time to other work, savings are productivity gains, not hard cash — model appropriately.
New system needs to connect to legacy ERP — assumed 2 weeks, took 3 monthsIntegration with existing systems is consistently the biggest source of overruns. Add 25–50% to development estimate if connecting to legacy or third-party systems.
Go-live budget has zero for training or adoption supportEmployees need training, and productivity dips during adoption (the "valley of despair"). Budget 10–15% of development cost for training, documentation, and early support.
Vendor quote of $150K entered as exact development costAdd a 20–25% contingency to any quoted development cost. Software projects routinely encounter unexpected complexity — the contingency converts a "best case" model into a realistic one.
Frequently asked questions
ROI = (Net Savings over period / Investment cost) × 100. Net savings = (annual manual process cost − annual software cost) × years. Payback period = software cost / annual net savings.
You might also need
Build vs Buy Calculator
Compare the 5-year cost of building custom software vs buying a SaaS subscription.
MVP Cost Estimator
Estimate the cost to build a software MVP based on features and team type.
Project Timeline Estimator
Estimate software project timeline in sprints from a feature checklist and team size.
Sprint Velocity Calculator
Calculate average sprint velocity from historical sprints and project remaining backlog.
Tech Stack Recommender
Answer 5 questions about your project and get a recommended technology stack.
SaaS Runway Calculator
Calculate how many months until you run out of cash, and your break-even point.
Customer Acquisition Cost Calculator
Calculate CAC from sales and marketing spend and benchmark against LTV.
Churn Rate Impact Calculator
See how monthly churn compounds into revenue loss over 12 months.
Further reading
Authority documentation and specifications behind this tool.
Need this built into your product?
We design and build custom software — SaaS platforms, MVPs, AI agents, and web apps.
Custom SaaS Development
End-to-end SaaS — from schema design to production deployment.
MVP Development
Working product in 6–8 weeks. Fixed price, committed timeline.
AI Agents for SaaS
AI-powered automation for support, onboarding, and revenue ops.
Web App Development
Full-stack web apps with modern architecture and cloud deployment.
Have a project in mind?
We turn ideas into production-ready software — SaaS, web apps, mobile, and AI agents. Fixed price. Committed timeline. No surprises.