Anyone in Norway aged sixteen or over can log in tonight and find out what the neighbours earn. Not a guess based on the car in the driveway. Take-home pay, net worth, the exact tax bill: all filed under a name and a postcode, sitting there like a bus timetable.
Norwegians have been able to do some version of this since 1863, back when the numbers lived in paper ledgers at the local tax office and checking them meant a trip into town. A century and a half later, little else has changed. What used to take an afternoon now takes a login.
What the list actually shows
Norway’s tax administration, Skatteetaten, runs a searchable tax list covering everyone who received a tax assessment. Seven fields: name, year of birth, postcode, tax municipality, net income, net wealth, tax paid. That is the lot. No deductions, no employer, no breakdown of where the money came from.
Opting out is not on the menu. Skatteetaten leaves out people with a legally protected address, anyone aged seventeen or under at year’s end, the dead, and cases where an entry would expose a client relationship. Everyone else is in, whether they fancy it or not, because parliament decided the public needs a way to check that assessments are being done properly.
Two guardrails keep it from becoming a free-for-all. Searchers must log in with verified ID, and each account gets 500 views a month before the tap runs dry.
The bargain underneath it
Honesty about money is normally a private arrangement between a person and the tax office. Nobody else gets a look. Under a system where the figures are open, the audience expands to include colleagues, in-laws, rivals, the bloke who runs the hardware shop, and anyone else with a spare afternoon and a grudge.
Norwegian legislators have long argued that the arrangement earns its keep through deterrence, since peer visibility turns tax cheating into a reputational risk that a distant institution can’t replicate on its own.
What happened when the ledgers went online
The first big test came in 2001, when the figures went onto the internet and nobody had to leave the house. Erlend Bø, Joel Slemrod and Thor Thoresen spotted a natural experiment in the rollout. A handful of municipalities had already circulated the data in cheap paper catalogues, so for those residents the change was minor while for everyone else it was enormous. Publishing in the American Economic Journal: Economic Policy, they found roughly 3 percent higher growth in reported income among business owners in places where online access represented a genuine jump in exposure.
Three percent sounds modest, and it is. Total income tax revenue moved by about 0.2 percent. Business owners are the interesting group here, since employers report salaried workers’ income directly, leaving little room to fudge anything.
One study, one country, one policy change, and nothing resembling settled science.
What changed in 2014
A second change in 2014 turned out to be the more revealing one. Searches stopped being anonymous. Log in and look someone up now, and that person can see your name, birth year and postcode in their search history, refreshed hourly.
Traffic collapsed.
Ricardo Perez-Truglia, then at UCLA, told Quartz that the numbers “went down like crazy”, and that plenty of remaining visitors were not there to check anyone’s income at all. They were checking who had been checking on them.
Mostly people are just nosy
Daniel Reck, Slemrod and Trine Vattø got hold of the search logs, roughly a million queries from 2014 and 2015, which made theirs the first study of who actually looks up whom in a public disclosure system. Their findings in the Journal of Public Economics are not flattering to the civic-duty theory. About a quarter of searches happened inside identifiable household or workplace networks. Most searchers looked up people much like themselves, though young low earners also went hunting for celebrities and the conspicuously successful.
And when someone discovered they had been looked up, they did not go on to report more income.
No deterrence effect showed up in the logs at all.
The cost that nobody costed
Separately, Perez-Truglia paired survey responses with the tax records to ask what all this visibility does to people. In a paper on income transparency and well-being, he estimated that moving the lists online widened the happiness gap between richer and poorer Norwegians by about 29 percent, and the life-satisfaction gap by roughly 21 percent.
Knowing your own salary is one thing. Knowing precisely where it sits relative to the person two desks over is another, and for whoever finishes second, the knowledge does no favours.
Who else does this
Several countries run something along these lines, though Norway is unusually casual about the delivery. Surveying the field for the Journal of Economic Perspectives, Slemrod notes that corporate tax information is public in Australia, Iceland, Finland, Pakistan and Sweden, and was once public in Japan. Sweden, Finland and Iceland allow requests about individuals, but that means filing a request rather than typing a name into a browser. Finland publishes its figures every 1 November, a date locals call National Jealousy Day.
Publishing what everyone contributes was the easy half of the Norwegian bargain. Adding a log of who came looking did more to change how the lists get used than 150 years of open ledgers ever managed. Any government tempted to copy the idea will need to work out which of those two features it actually wants.