Upgrading software feels risky—until the extra revenue or time savings dwarf the monthly fee. Here’s a cold-hard-numbers look at Invoice Master Premium.
Free vs Premium at a Glance
| Feature | Free Plan | Premium Plan | |---------|-----------|--------------| | Invoices / Quotes per month | 20 | Unlimited | | Clients / Products | 50 each | Unlimited | | File Attachments | No | Yes (up to 25 MB per doc) | | Payment Links | No | Yes (Stripe) | | Kanban Boards | 1 board | Unlimited + WIP limits | | Inventory Module | No | Full access | | Data Export | Manual | Scheduled + API | | Priority Support | Community | 24 h email |
Quick ROI Formula
Monthly ROI = (New Revenue + Time Saved × Billable Rate – Subscription Cost) / Subscription Cost
Example: Freelance Designer
- New Revenue: Unlimited invoices let her accept one extra €800 retainer each month.
- Time Saved: File attachments + quote-to-invoice flow shave 2 h/month. At €60/h that’s €120.
- Premium Cost: €19/month.
ROI = (€800 + €120 – €19) / €19 ≈ 48× return. Upgrade is a no-brainer.
Example: Small Agency (3 users)
- New Revenue: Payment links cut average payment delay from 15 → 3 days, improving cash-flow to take on one extra €2 000 project per quarter → €667/month.
- Time Saved: Automated exports save bookkeeper 3 h/month @ €40/h → €120.
- Premium Cost: €39/month.
ROI = (€667 + €120 – €39) / €39 ≈ 19× return.
Hidden Wins
- Fewer missed expenses: Attach receipts to bills → tangible tax deductions.
- Client stickiness: Branded portals + faster pay options make switching hard.
- Investor readiness: Scheduled exports keep due-diligence docs one click away.
When FREE Is Enough
Stay on the Free plan if you:
- Invoice <20 times a month and rarely need attachments.
- Serve a single long-term client (no contact limit pressure).
- Don’t require inventory or task boards.
Upgrade Checklist (5 Minutes)
- List monthly invoice count and projected growth.
- Estimate hours lost to manual work (attachments, exports, payment chasing).
- Plug numbers into the ROI formula.
- Start 14-day Premium trial.
- Measure saved hours and faster payments—decide with data, not guesswork.
Verdict: If Premium adds just one sale or saves two billable hours per month, it pays for itself many times over. Run your numbers—chances are the upgrade isn’t a cost; it’s a profit lever.
