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K-OS Billing
Automation software for SMEs and consulting firms
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K-OS Billing - 2026 Pricing, Features, Reviews & Alternatives
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Last updated: October 2026
K-OS Billing overview
What is K-OS Billing?
K-OS Billing is AI-powered invoicing and accounting software for SMBs, freelancers and accounting firms in Spain. Upload a photo or PDF and the AI classifies the document, extracts the data and calculates VAT automatically, with no manual entry. It is VeriFactu-compliant (Royal Decree 1007/2023): it generates chained, signed invoice records, and its connection to the Spanish tax agency (AEAT) is validated, with acknowledgement and CSV. It also includes automatic bank reconciliation, a tax engine that computes VAT, income tax and corporate tax (warning you before each deadline), accounting export, and a fiscal assistant that answers with verifiable citations from official sources. Built for accounting firms, it offers a multi-client dashboard to manage your whole portfolio, and firms can resell the service to their clients at their own price. Proprietary software, part of the K-OS ecosystem by Kavena Consulting. Plans from EUR 49.95/month + VAT, no lock-in.
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K-OS Billing’s user interface
K-OS Billing's key features
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K-OS Billing alternatives
K-OS Billing
Starting from
49.95
Per month
Jobber
Starting from
39
Per month
Xero
Starting from
25
Per month
PayPal
Starting from
0.09
K-OS Billing pricing
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K-OS Billing support options
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