Almost every small business starts with quotes and invoices in Excel or Word. It is free, familiar and works for the first few clients. But as the business grows, the template becomes a trap: copied files, wrong numbers, forgotten payments and evenings spent on paperwork. Here is an honest comparison of Excel and invoicing software - and how to know when it is time to switch.
In short
- Excel is fine for a handful of invoices a month, but does not number, remind or check anything by itself.
- Invoicing software saves time on every document, reduces errors and shows who has not paid.
- Clear signs to switch: more than 10 invoices a month, missed payments, work on the phone, e-invoice requests.
- Switching takes an afternoon: import customers and products from CSV.
What Excel does well
To be fair: Excel is flexible, you already have it, and you can build almost anything. For a new business with three clients a month, a simple template is a reasonable start.
Where Excel costs you money
Time on every document
Copying the last file, deleting old items, changing the number and date, saving as PDF, attaching it to an e-mail - every invoice takes 10-15 minutes. With 30 invoices a month, that is a full working day.
Errors
A wrong formula, a forgotten row in the total, the wrong VAT rate, a duplicate invoice number. Errors in invoices cost money and trust, and duplicate numbers cause problems with the tax office.
No overview of payments
Excel does not know who paid. Open and overdue invoices are found only when you check them manually - and that is usually too late.
No quote-to-invoice flow
The accepted quote has to be retyped as an invoice. Advances have to be calculated and deducted by hand.
Not made for the phone
On the job site, you cannot quickly write and send a quote from an Excel file on your phone.
What invoicing software does better
- Automatic numbering and correct totals and VAT, every time.
- Quote to invoice in one click, with advances deducted automatically.
- Sending as a link via WhatsApp, Viber or e-mail, with client e-signature on the phone.
- Automatic reminders for overdue invoices.
- Overview of income, expenses and profit per project.
- E-invoices in Peppol UBL / EN 16931 next to the PDF.
- Documents for the accountant in one click instead of searching through folders.
Seven signs it is time to switch
- You send more than 10 quotes or invoices a month.
- You have forgotten to invoice a job or chase a payment at least once.
- You write quotes in the evening because there is no time during the day.
- You want to send quotes from the job site, on your phone.
- Clients or public authorities ask for e-invoices.
- You have a team and several people need access.
- You do not know exactly which job earned money and which did not.
If two or more apply to you, Excel is costing you more than software would.
Switch in one afternoon: import customers and products from CSV, choose a template and send your first quote. Try AdBooks free for 14 days - no credit card, no automatic charge.
What does invoicing software cost?
Compared to the time it saves, very little. AdBooks Pro costs 199 € per year (excluding VAT), which is about 55 cents per day. If it saves you only one hour a month, it pays for itself many times over.
Frequently asked questions
Can I import my existing customers?
Yes. Customers and products can be imported from a CSV file, which you can export from Excel.
What happens to my old invoices from Excel?
Keep them archived as you have so far. Start new numbering in the software from the next number in your sequence.
Do I need to install anything?
No. AdBooks runs in the browser on your computer and phone, without installation.
Is my data safe?
AdBooks stores data on servers in Germany, with an encrypted connection and regular backups, and you can export it at any time.
Conclusion
Excel is a good start, but a poor tool for growth. When invoices take your evenings, payments slip through and clients ask for e-invoices, software pays for itself in the first month. The switch takes an afternoon - and gives you back hours every week.