T
Hndy Tools

Should I Buy or Build? Calculator

Get a clear buy vs. build recommendation with break-even analysis for any tool or software.

Finance
Development
Business

Cost Details

— BUY —

— BUILD —

About This Tool

The buy vs. build decision is one of the most common for developers, entrepreneurs, and businesses. This calculator gives you a clear financial answer based on your true hourly cost and realistic usage period.

If the build option involves learning new skills, factor in the learning value with our Skill ROI Calculator. For freelancers pricing custom builds for clients, use the Hourly Rate Lie Detector to ensure your rate reflects your real effective cost.

All calculations happen in your browser — no data is sent to any server.

How It Works

Buy Cost(t) = One-time Cost + Monthly Subscription × t
Build Cost(t) = Build Hours × Rate + Maintenance Hours × Rate × t
Break-even Month = (Build Hours × Rate − One-time Cost) ÷ (Monthly − Maintenance Hours × Rate)
Recommendation = Buy if Buy Cost(t) < Build Cost(t), else Build

Both costs are linear functions of time t (months). The break-even formula solves Buy Cost(t) = Build Cost(t) for t. It only yields a valid answer when the monthly subscription exceeds the monthly maintenance cost — otherwise the build option is always cheaper from a running-cost perspective and no break-even exists.

Frequently Asked Questions (FAQ)

What costs should I include in "purchase cost"?
Include any one-time license or setup fee. If the tool is subscription-only, enter 0 as the purchase cost and enter the monthly fee separately.
Should I include my learning time in "hours to build"?
Yes — be honest about the full build time including research, debugging, and learning unfamiliar technologies. Most people underestimate this by 2–3×.
What counts as maintenance?
Bug fixes, dependency updates, feature additions, and hosting management. Even simple tools typically require 0.5–2 hours per month of ongoing attention.
When should I build even if buying is cheaper?
When you need deep customization, the tool handles sensitive data you cannot share with third parties, or the skill development has value beyond the tool itself. Use our Skill ROI Calculator to evaluate that learning value.

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