Keep household survival separate from an exciting sales forecast.
Build at least three household scenarios
- No business income yet.
- A cautious income after business costs and tax set-asides.
- A likely income supported by evidence.
Include any reduced salary, insurance, software, travel, childcare or debt payment that changes. Keep business revenue and personal take-home income distinct.
The calculator is not business accounting or tax software. Its useful question is whether the household can carry the early stage, for how long and under which assumptions. An accountant or adviser can help with the business structure and tax consequences.