Kostly vs. Excel for Expense Tracking: An Honest Comparison
Excel Is Powerful, But Is It the Right Tool for Recurring Expenses?
Before getting into why a dedicated tool like Kostly exists, let's give Excel (and Google Sheets) the credit it deserves. Spreadsheets are incredibly flexible. You can track anything, build any formula, create any view. Millions of freelancers manage their finances in spreadsheets, and many do it well.
If you're disciplined, comfortable with formulas, and have the time to maintain one, Excel can work for expense tracking. This isn't a hit piece. It's a realistic look at where spreadsheets start to crack.
Where Does Excel Work Well for Expense Tracking?
Full control over structure. You decide the columns, formatting, and calculations. Nobody forces a workflow on you.
Familiar tool. Most people already know how to use Excel or Sheets. Zero learning curve for basics.
Free (mostly). Google Sheets is free. Excel comes with Microsoft 365 you're likely paying for anyway.
Custom formulas. Want to calculate your tax-adjusted annual cost per category with a weighted monthly average? You can build that formula.
Data export. Your data lives in a file you own. No vendor lock-in.
If expense tracking were purely about storing numbers, spreadsheets would be the obvious choice forever.
Where Does Excel Fall Apart for Recurring Costs?
Expense tracking isn't purely about storing numbers. It's about maintaining a living system that stays accurate over time and surfaces the right information at the right moment.
How Do You Handle Mixed Billing Intervals?
A spreadsheet for recurring expenses needs custom formulas for every interval type. Monthly, quarterly, yearly: each needs different math to calculate annual totals and next due dates. At 30 expenses with mixed intervals, your IF-formula nesting becomes a maintenance nightmare.
Kostly handles this automatically. Enter an expense with its interval, and the system calculates next due date, annual cost, and monthly equivalent without you touching it again.
What Happens After Two Months of Manual Updates?
Every price change, every new subscription, every cancellation requires manual entry. Miss one update and your data is wrong. Miss several and you stop trusting the spreadsheet. Once trust is gone, you stop looking at it.
We've seen this pattern hundreds of times. A dedicated tracker removes this maintenance burden entirely.
Can Your Spreadsheet Tell You What's Due This Week?
Excel stores numbers. It doesn't proactively tell you that 450 EUR in renewals hit on Friday. You can add conditional formatting, but your spreadsheet won't send a notification. You have to remember to open it and check.
Kostly's dashboard shows what's due this week, this month, and this quarter without any formula engineering.
What About Team Access?
Your spreadsheet works until two people edit it. Then you get merge conflicts, accidentally deleted formulas, and expenses_v3_final_FINAL.xlsx on someone's desktop. A web-based tracker has one version. Always. Every device sees the same data.
Honest Feature Comparison: Kostly vs. Excel
| Feature | Excel / Sheets | Kostly |
|---|---|---|
| Initial setup time | 30-60 min to build structure | 5 min to start adding expenses |
| Recurring cost calculation | Manual formulas | Automatic |
| Next due date tracking | Manual or complex formulas | Built-in |
| Annual projection | Build it yourself | One glance at the dashboard |
| Price change tracking | Manual updates | Update the amount, dashboard always reflects current costs |
| Mobile access | Clunky on phone | Responsive web app |
| Category analysis | Pivot tables (if you know how) | Automatic charts |
| Multi-user | Google Sheets collaboration | Role-based access |
| Cost | Free (Sheets) / included (M365) | Free tier available, paid from 2.99 EUR/month |
| Data ownership | Full | Full (export anytime) |
| Learning curve | Low (basic), High (advanced) | Low |
When Should You Stick with Excel?
- You have fewer than 10 recurring expenses
- You genuinely enjoy maintaining spreadsheets
- You need custom calculations no tool offers
- You're the only person who needs to see the data
- Your spreadsheet is actually up to date (be honest)
When Should You Switch to a Dedicated Expense Tracker?
The tipping point usually comes with these signals:
- 10+ recurring expenses across different billing intervals
- Your spreadsheet is outdated or you stopped maintaining it
- Surprise charges because you forgot what's due when
- Multiple people need access to expense data
- You'd rather spend time on actual work than maintaining formulas
What About Using Both?
Some users keep both. They use Kostly for day-to-day tracking and visibility, then export to Excel for custom tax calculations or annual reports. Use the dedicated tool for what it does well, and the spreadsheet for edge cases.
Is the Cost Worth It?
Kostly's free tier covers up to 10 expenses, enough for many freelancers. The Solo plan at 2.99 EUR/month covers up to 50 expenses.
Here's the real question: if your spreadsheet is out of date (and statistically, it probably is), you're already paying an invisible cost. Missed cancellation deadlines, forgotten renewals, no visibility into total spend. These easily cost more than 3 EUR per month.
The cheapest tool is the one you actually use.
Look at your current spreadsheet right now. Is it up to date? Does it show you what's due next week? Can you tell me your total annual recurring costs without opening the file?
If the answer to any of those is no, you've already outgrown the spreadsheet.