No 01 / 06 · The Leader

Global tax data,
unfolded.

A precision instrument for reading income tax — twelve countries, fifty states, eighteen government sources. Every figure traceable. Every reading deterministic.

Plate I Konstruktionsplan · 1989
Fig. 1 — An instrument of precision. A hand, a rule, a plan.
Reading Scale · US Federal 2026 · Marginal Rate by Gross Income
$0
10%
12%
$50k
22%
$100k
24%
32%
$250k
35%
37%
$1M+
§ I · The Ledger

Twelve countries, at a glance.

Top statutory marginal rate for 2026, by jurisdiction. Each entry opens a calculator grounded in its authority of record.

No 02 / 06 · Countries
№JurisdictionISOCur.Top rateBracketsAuthorityVerified
01
United States
US USD 37 % 7 Internal Revenue Service (IRS) Apr 21 '26 Open →
02
Canada
CA CAD 33 % 5 Canada Revenue Agency (CRA) Apr 21 '26 Open →
03
United Kingdom
GB GBP 45 % 3 HM Revenue & Customs (HMRC) Apr 21 '26 Open →
04
Germany
DE EUR 45 % 5 Bundesministerium der Finanzen Apr 21 '26 Open →
05
France
FR EUR 45 % 5 Direction Générale des Finances Publiques Apr 21 '26 Open →
06
Spain
ES EUR 47 % 6 Agencia Tributaria Apr 21 '26 Open →
07
Singapore
SG SGD 24 % 13 Inland Revenue Authority (IRAS) Apr 21 '26 Open →
08
Australia
AU AUD 45 % 5 Australian Taxation Office (ATO) Apr 21 '26 Open →
09
United Arab Emirates
AE AED 0 % 1 Federal Tax Authority Apr 21 '26 Open →
10
Ireland
IE EUR 40 % 3 Revenue Commissioners Apr 21 '26 Open →
11
Netherlands
NL EUR 49.5 % 3 Belastingdienst Apr 21 '26 Open →
12
Sweden
SE SEK 52 % 2 Skatteverket Apr 21 '26 Open →
§ II · Method

Math you can verify, context you can trust.

Two pipelines, strictly separated. Numeric figures come from statutory bracket tables; explanatory prose is grounded in cited publications. They never intermix.

No 03 / 06 · Method
01
Deterministic

Every figure is read directly from verified statutory bracket tables and formulas. No AI participates in the numeric pipeline.

02
Grounded

Every explanation cites a page from IRS, OECD, or national-authority publications. Retrieval-augmented, never invented.

03
Traceable

Every reading includes its source document, section, and verification date. Audit any figure in under thirty seconds.

04
Instantaneous

Sub-200 ms responses with edge computation. The slider moves; the brackets update the same frame.

An editor's note
“Every number on this site is a citation — a reading taken from a publication of record, set in type exactly as the publication sets it. We compute, but we do not invent.”
— The FiscalFold Masthead
No 04 / 06 · Invitation

Pick a jurisdiction.
Unfold your tax.

Open Calculator → Read the methodology →