Slovak tax reliability index API: the Financial Administration's rating by company ID

The tax reliability index from the Slovak Financial Administration's public list, by company ID or tax number, with rating changes tracked daily.

Facts on this page checked Oct 2, 2026

In brief

  • The Slovak Financial Administration rates tax subjects as highly reliable, reliable or less reliable, and publishes the list.
  • We return the rating by company ID, tax number or VAT ID, in the same answer as the VAT payer status.
  • When a watched company's rating changes, it arrives as an event in the change feed, by webhook or by email.
Publisher
Financial Administration of the Slovak Republic
Source list
tax reliability index (ds_iz_ran)
Coverage
about 650,000 subjects
Refresh
daily at 4:00 UTC
Endpoints
/vat/verify/{identifier}, /organizations/{cin}?include=vat

What the rating means

The Financial Administration assigns the index by how a subject meets its tax obligations. Three grades are published: highly reliable (vysoko spoľahlivý), reliable (spoľahlivý) and less reliable (menej spoľahlivý). A subject absent from the list has no rating — which is not the same as a poor one.

The rating in a verification answer
curl https://api.apino.sk/api/v1/vat/verify/35763469 \
  -H "Authorization: Bearer $APINO_KEY"

{
  "is_vat_payer": true,
  "ico": "35763469",
  "name": "Slovenská sporiteľňa, a.s.",
  "tax_reliability": "vysoko spoľahlivý"
}

Following changes

A change of rating is the tax_reliability type in the change feed, with the old and the new value. You keep the list of companies to watch in the application and receive the changes once a day.