Learn How Kumberi Models UK Money Decisions

How we model UK state pensions, workplace pensions, and retirement income in your journeys.

How we calculate state pension, private pensions, and lifetime allowance in your projections.

How we calculate tax-free pension withdrawals in your journeys.

How we apply safe withdrawal rate principles (like the 4% rule) to your retirement journeys.

How we calculate Financial Independence what-ifs and early retirement projections.

How we calculate interest savings and term reductions when you overpay your mortgage.

How we model remortgaging costs, savings, and timing in your journeys.

How we calculate ERCs when modelling early mortgage repayments.

How shared ownership, staircasing and rent on the unsold share work — use the mortgage calculator; this is not yet inside a journey.

How we model Cash ISAs, Stocks & Shares ISAs, and Lifetime ISAs in your journeys.

How we model different market conditions and volatility in investment projections.

How we use Monte Carlo methods to model investment uncertainty and risk.

How we calculate company car tax and BiK charges in your journeys.

How we calculate P11D values for company benefits.

How we calculate BiK for electric company cars and their tax advantages.

How we model the cost comparison between electric and hybrid company cars.

How we calculate employer NI contributions on benefits in kind.

How we model salary sacrifice schemes and their tax/NI benefits.

How we calculate Plan 1, Plan 2, Plan 4, and Postgraduate loan repayments.

Age bands, the £100,000 income limit, how free hours and Tax-Free Childcare reduce costs, and how we apply them in journeys.

Detailed breakdown of how Kumberi performs all financial calculations and applies UK tax rules.