Do expenses always reduce tax by the same amount?
No. Treatment depends on structure and whether expenses are reimbursed, allowable, and documented. Use this for planning and validate with your advisor or accountant.
What is the main thing to compare?
Compare net disposable income after tax and core costs, then review pension contributions, risk, and stability. The best choice depends on your situation.
Does this include all company and compliance costs?
Not automatically. Enter realistic fees and recurring costs for your structure so the scenario matches your situation.