Worked example
Calculated 2026-07-22 Spain passport
186 visa-light destinations
167.1 weighted score
Raw 122 visa-free + 28 on arrival + 11 ETA + 25 e-Visa = 186
Weighted 122×1.0 + 28×0.8 + 11×0.7 + 25×0.6 = 167.1
Methodology
Passport Mobility Index
See how a passport-destination rule becomes a score, which source supports it, and where to inspect the live result.
39,402 passport-destination rules
199 passport codes represented
199 destinations represented
100% of the loaded route matrix*
* Coverage counts whether a tourism rule exists for each international route in the loaded dataset: 39,402 ÷ (199 passport origins × 199 destinations − 199 domestic self-pairs) = 100%. It does not mean every rule has been reverified against a primary government source.
Evidence Priority
Which Sources Win
Destination authorities are the controlling source. Industry systems and public indexes help us catch discrepancies, but they do not override a government's published entry rule.
- Destination government guidance Immigration, foreign-ministry, and border-authority pages are the preferred primary evidence. See official sources attached to current rules
- IATA Timatic Operational cross-check for the document rules airlines use at boarding. Open IATA Timatic
- Public index benchmarks Used to surface outliers for review, not as primary evidence for a route. Henley Passport Index Passport Index
The Arithmetic
How a Score Is Built
The headline mobility score counts every destination that does not require a consular visa before travel. The weighted score distinguishes a true visa-free trip from an ETA, visa on arrival, or e-Visa.
Entry rule Raw Weighted
Visa-free +1 +1.0
Visa on arrival +1 +0.8
ETA +1 +0.7
e-Visa +1 +0.6
Visa required +0 +0.0
Confidence is review metadata, not a multiplier. A 3 means an official source; 2 means multiple sources agree; 1 marks an editorial or third-party baseline. Only the entry status feeds the raw and weighted scores, so confidence never adds or subtracts mobility points.
From Source to Rule
Collection Workflow
Every rule stores a source URL, access date, and content hash. That makes a changed immigration page reviewable instead of silently changing a score.
01
Discover
Locate the destination government's visitor-entry guidance.
02
Normalize
Store the route as visa-free, ETA, on arrival, e-Visa, or visa required.
03
Verify
Attach the source and confidence level; flag conflicts for review.
04
Refresh
Hash changes reveal when the underlying entry guidance has moved.
Evidence in the Index
Tracked Sources, With Real Rules
This is the complete set of unique citations attached to the current live mobility rules—not a sample. The example links open the passport score and destination table that consume each source.
Example rule
Visa required Raw +0 Weighted +0.0