Coding questions · Interactive Brokers
Calculate Tax in a Progressive Marginal Tax System
Practice a Interactive Brokers coding interview problem focused on calculate tax in a progressive marginal tax system. The prompt emphasizes edge cases, clean implementation, and verifiable test behavior without revealing the solution.
Implement a progressive marginal tax calculator. Brackets are sorted (lower_cutoff, rate) pairs. Each portion of income is taxed at the rate for its bracket until the next cutoff.
Implement:
def calculate_progressive_tax(brackets: list[tuple[float, float]], income: float) -> float:
pass
Progressive Marginal Tax Calculator
Calculate total tax owed under sorted marginal tax brackets.
Examples
Example 1
Input: {"brackets":[[0,0.1],[10000,0.2],[50000,0.3]],"income":60000}
Output: 12000.0
Explanation: Progressive sample.
Example 2
Input: {"brackets":[[0,0.1]],"income":100}
Output: 10.0
Explanation: One bracket.