A rules-based tax planning SaaS that lets users enter income, residency, pension, investment, and family details, then simulates scenarios across jurisdictions. It would show take-home pay, tax owed, retirement contribution impact, refund estimates, and threshold effects in plain language, with exportable reports for accountants or advisers.

Rising incomes, remote work, international mobility, and frequent tax-rule changes are making personal tax decisions more complex for professionals. Users are actively seeking tools that go beyond generic advice and give tailored, scenario-based answers.