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更新日2026年7月16日 23:13

Icelandic take-home salary calculator (payday.is) — tax and pension breakdown.

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jokull

jokull/icelandic-data

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Payday.is Salary Calculator (Laun)

Icelandic take-home salary calculator via payday.is public API.

API

Endpoint: POST https://payday.is/is/ajax/calculator/calculateSalary/
Auth: None (public XHR, requires X-Requested-With: XMLHttpRequest)
Format: JSON request/response

Input Modes

Gross salary — set Salary, leave TotalCost null
Employer total cost — set TotalCost, leave Salary null

2025 Default Rates

Parameter	Default	Description
PensionContributionEmployeePercentage	4.00%	Mandatory employee pension
PensionContributionEmployerPercentage	11.50%	Mandatory employer pension
RehabilitationFundPercentage	0.10%	Starfsendurhæfingarsjóður
IncomeTaxStep1Percentage	31.49%	Up to ~446,136/mo
IncomeTaxStep2Percentage	37.99%	446,136–1,252,501/mo
IncomeTaxStep3Percentage	46.29%	Above 1,252,501/mo
InsuranceFeePercentage	6.35%	Tryggingagjald (employer)
PersonalTaxAllowancePercentage	100%	Persónuafsláttur (72,492 kr/mo in 2025)

Usage

# Monthly gross -> take-home
uv run python scripts/laun.py 1000000

# From employer total cost
uv run python scripts/laun.py 1200000 --total-cost

# With union fee
uv run python scripts/laun.py 750000 --union 1.1

# Full JSON breakdown
uv run python scripts/laun.py 1000000 --json

# Additional voluntary pension (viðbótarlífeyrissparnaður)
uv run python scripts/laun.py 1000000 --additional-pension 4.0

Response Fields

Key fields in the JSON response data:

salary — gross monthly salary
totalCost — total employer cost
payoutAmountSalary — take-home pay
incomeTaxEmployeeTotalAmount — total income tax
pensionContributionEmployeeTotalAmount — employee pension
personalTaxAllowanceAmount — tax credit applied

Caveats

Tax rates change yearly — defaults are 2025 rates baked into payday.is
Union fee varies by union (typically 0.7–1.25%)
Does not account for benefits in kind, car allowance, etc.
Personal tax allowance is per-person; couples can transfer unused allowance via SpouseTaxAllowancePercentage

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Payday.is Salary Calculator (Laun)

Icelandic take-home salary calculator via payday.is public API.

API

Endpoint: POST https://payday.is/is/ajax/calculator/calculateSalary/

Auth: None (public XHR, requires X-Requested-With: XMLHttpRequest)

Format: JSON request/response

Input Modes

Gross salary — set Salary, leave TotalCost null

Employer total cost — set TotalCost, leave Salary null

2025 Default Rates

Parameter

Default

Description

PensionContributionEmployeePercentage

4.00%

Mandatory employee pension

PensionContributionEmployerPercentage

11.50%

Mandatory employer pension

RehabilitationFundPercentage

0.10%

Starfsendurhæfingarsjóður

IncomeTaxStep1Percentage

31.49%

Up to ~446,136/mo

IncomeTaxStep2Percentage

37.99%

446,136–1,252,501/mo

IncomeTaxStep3Percentage

46.29%

Above 1,252,501/mo

InsuranceFeePercentage

6.35%

Tryggingagjald (employer)

PersonalTaxAllowancePercentage

100%

Persónuafsláttur (72,492 kr/mo in 2025)

Usage

# Monthly gross -> take-home uv run python scripts/laun.py 1000000 # From employer total cost uv run python scripts/laun.py 1200000 --total-cost # With union fee uv run python scripts/laun.py 750000 --union 1.1 # Full JSON breakdown uv run python scripts/laun.py 1000000 --json # Additional voluntary pension (viðbótarlífeyrissparnaður) uv run python scripts/laun.py 1000000 --additional-pension 4.0

Response Fields

Key fields in the JSON response data:

salary — gross monthly salary

totalCost — total employer cost

payoutAmountSalary — take-home pay

incomeTaxEmployeeTotalAmount — total income tax

pensionContributionEmployeeTotalAmount — employee pension

personalTaxAllowanceAmount — tax credit applied

Caveats

Tax rates change yearly — defaults are 2025 rates baked into payday.is

Union fee varies by union (typically 0.7–1.25%)

Does not account for benefits in kind, car allowance, etc.

Personal tax allowance is per-person; couples can transfer unused allowance via SpouseTaxAllowancePercentage

name	laun
description	Icelandic take-home salary calculator (payday.is) — tax and pension breakdown.