1. Baseline first
Start with current pay, household support, debts and cash. Otherwise every later comparison floats in the air.
Work through the eight areas most likely to change your household answer: income, HMRC, family, property, debt, investing, pensions and tax-year timing. Tick off what is already checked, then print the remaining action list.
Tick each area only when you have either checked it already or opened the recommended page and saved the scenario you need.
Start with current pay, household support, debts and cash. Otherwise every later comparison floats in the air.
Then check adjusted net income, Child Benefit, childcare, pension taper and allowances. These are where small changes can matter.
Only after the household baseline is clear should you compare ISA, GIA, pension, LISA or company extraction choices.
Use My Scenarios to keep the old route, new route and notes. A free tool is only useful if you can revisit it later.