Why this matters
The assumption changes the projection.
Contributions affect how quickly the portfolio approaches the required target. Over long periods, contributions and compounding work together inside the projection.
Year effect
The year moves when the model input moves.
Higher monthly savings can move the projected year earlier. Lower monthly savings, pauses, or irregular saving patterns can move the projected year later.
Model assumption
The calculator keeps the assumption deliberately simple.
Undefeated treats the entered Monthly Savings amount as steady and annualises it at the projection boundary. It does not forecast income changes, bonuses, career breaks, or one-off investments.
Model limits
The real world may not match the model input.
Income, employment, household costs, tax allowances, or investable surplus changes from the savings path represented in the input.