Invoicing and KPO software
Invoices, payments and the KPO book in one place
LagerOS is software for sole traders and small businesses in Serbia: invoices issued, who paid, who owes and how much turnover you made this year. The invoice goes to the customer as a PDF and, if needed, to SEF.
Why sole traders switch to LagerOS
Invoices in Word, payments in Excel and a KPO book filled in by hand mean the same work three times. In LagerOS an invoice goes into the customer's account and the KPO book by itself; you only enter the payment.
What the invoicing software does
Invoices, pro forma invoices and delivery notes
An invoice from items (reduces stock if you keep a warehouse) or free text, with a payment term and the customer's discount. A pro forma invoice becomes an invoice in one click, and one invoice can cover several delivery notes.
Send the invoice to the customer as a PDF, by email, Viber or WhatsApp.
Sending to SEF
If you use e-invoicing, enter your own SEF API key and send invoices from the app. The SEF status shows on the invoice and in the list. Without SEF you send invoices as a PDF.
Customers, debts and payments
A customer's account: invoices, payments and the balance, calculated by itself. You see who is late with payment and by how much, and a payment goes to an invoice or to the total debt.
KPO book for flat-rate sole traders
The turnover book fills itself from invoices and the checkout, with manual entries for everything else. The app tracks the flat-rate and VAT limits and warns you in time. Download the form as a PDF.
More for invoicing
Salespeople
Assign a salesperson to a customer, and the report shows turnover per salesperson.
NBS exchange rate
For businesses in euros the app suggests the NBS middle rate for the invoice date.
Turnover report
One report for invoices and the checkout, per day, month and customer, with export to PDF and Excel.
Every change recorded
The change history shows who changed what on an invoice or payment, and when.
Everyone sees their part
Owner, manager, seller or accountant, each with their own account and permissions.
Your data is yours
Export all data to Excel at any time. The server is in the EU, with nightly backups.
Invoices and books from €10 a month
The first month is free, with no limit on invoices. Prices are without VAT, as the provider is not registered for VAT.
Do you also sell goods?
LagerOS also runs the warehouse and checkout: receiving and selling by scanning, stock and profit. See the stock and sales software.