Deuslogis Summa
The books for a Serbian paušalac, kept clear.
Invoices, the KPO ledger, your tax limits, foreign-currency income, and every document a small business needs — in one calm app, built for entrepreneurs who invoice clients abroad. No accountant in the loop.
Now in private use · early access opening in 2026
Why it’s different
Built for the income that comes from abroad.
Most paušal tools assume you bill dinars to clients down the street. But a growing number of Serbian entrepreneurs — developers, engineers, designers — earn in euros and dollars from clients abroad. That income behaves differently: it converts at the National Bank’s middle rate on the day of supply, it lands on a devizni račun after the bank takes its margin, and it counts toward your limits in ways a domestic-only tool quietly gets wrong.
Deuslogis Summa treats foreign income as first-class. It converts EUR and USD to dinars at the NBS middle rate, tracks what the bank’s spread actually costs you, and keeps both limits straight — the 6-million paušal ceiling, which counts your foreign turnover, and the 8-million VAT threshold, which does not. The numbers you see are the numbers the Poreska uprava will.
What it does
Everything the paperwork needs, in one place.
Two limits, always in view
Your 6M paušal ceiling and 8M VAT threshold, tracked live and scoped correctly — foreign turnover counts toward one and not the other. Amber at 80%, red at 90%.
Foreign income, first-class
Invoice in EUR or USD. Summa converts to dinars at the NBS middle rate on the supply date and tracks your devizni račun alongside your domestic account.
What actually lands
It snapshots your bank’s tariff and the real cost of converting currency, so you see your true, all-in income — not just the figure printed on the invoice.
The KPO book, kept for you
Your knjiga o ostvarenom prometu is maintained automatically from invoices and payments, and exports in the official column shape — PDF, CSV, or XLSX — ready for the tax office.
Every document, in order
Invoices, quotes, proformas, contracts, statements of work, and handover records — issued, numbered, and archived. Quotes and proformas convert to invoices in a click.
Bank import & reconciliation
Import a bank statement as CSV and Summa matches payments to invoices by amount and reference, flagging anything that doesn’t line up.
Serbian, English, or both
Issue any document in Serbian, English, or bilingual — exactly the way you need it for a client in Belgrade or in Berlin.
Independence, watched
Paušal status depends on not looking like an employee. Every contract carries an independence clause, and the dashboard warns when one client grows past ~70% of your turnover.
Your data stays yours
Issued invoices and KPO entries are never silently deleted. Export everything — a full JSON dump plus your files — whenever you like. Every change is logged.
The paperwork
Six documents, one source.
Each renders the same way on screen and on paper, in the language you choose — drafted, issued, and kept in a searchable archive.
Who it’s for
For the paušalac who earns abroad.
Developers, engineers, designers, and other entrepreneurs taxed as paušalci in Serbia — especially those invoicing clients in the EU, the US, and beyond. It’s the tool Deuslogis built to run its own books, now being opened to a small group of early users.
Summa gives you sensible defaults and clear numbers — not tax advice. Thresholds, the KPO recognition basis, and your obligations remain yours to confirm with the Poreska uprava or your accountant. e-Faktura (SEF) and public-sector invoicing are on the roadmap, not in today’s build.
Claritas ex Complexu
Want in early?
We’re opening Deuslogis Summa to a small group of early users in 2026. Tell us a little about how you invoice, and we’ll be in touch.