Topic Service

Solo Invoices

Solo

Now available in Microsoft Store

Invoicing without unnecessary complexity

Solo Invoices is a free desktop application for companies, independent professionals, and self-employed people who invoice in Bulgaria.

Local application for Windows 10/11 x64

Get it free from Microsoft Store Explore the features
Solo Invoices application icon
Free Local operation Bulgarian and English

Get started in three steps

  1. Install Solo Invoices from Microsoft Store.
  2. Enter the issuer details and the essential working settings.
  3. Add a customer and a product or service, then create the first draft.

Create the first local backup after completing the setup.

Practical capabilities

Focused on creating, preserving, and tracking everyday business documents.

  • Invoices, credit notes, and debit notes
  • Advance and final invoices with advance deduction
  • Pro forma documents created from drafts
  • Counterparties, goods, and services
  • Sales without invoices and applicable VAT workflows
  • PDF, printing, search, and preserved revisions
  • Reports, receivables, and a VAT centre
  • Foreign-currency documents with traceable EUR equivalents
  • Local backup, restore, import, and export
  • Bulgarian and English interface

Your data remains under your control

Company, customer, document, settings, attachment, and generated PDF data is stored locally in application-managed folders.

Normal invoicing does not require a permanent internet connection. Network requests occur only for explicitly selected services such as VIES, exchange rates, and free registration.

Solo Invoices Privacy Policy
  • No application-owned cloud database
  • No hidden telemetry
  • No automatic invoice transmission
  • User-controlled backup and exchange

Free use and registration

100invoices without registration

The application is free, with no subscription or payment. You can issue up to 100 invoices without registration, including the 100th.

Free registration is required before issuing the next invoice.

Reaching the threshold does not block existing data, drafts, PDFs, reports, backup, import, export, or the remaining functions.

Why we created Solo Invoices

We wanted a strong business start not to depend on a large upfront investment in software. That is why we created a practical free product for people and companies with ideas, ambition, and potential.

With thanks

Solo Invoices is a Topic Service initiative. Our team created the concept, business logic, and practical rules, while software specialists from partner companies and friends of the project volunteered their time to support the technical implementation. We thank them for helping turn the idea into a finished product.

The application at work

Solo Invoices draft editor with lines, VAT, and totals
Draft editor with lines, VAT, totals, and checks before issue.
Solo Invoices work center for the selected month
Work center with current tasks, receivables, and documents for the selected month.
Monthly VAT center in Solo Invoices
Monthly VAT center with document review and the Bulgarian sales journal.

Current version 1.0 · Published September 2026 · Updates through Microsoft Store