## Use net income, stress the rate
Loan-to-income and Mortgage payment should use take-home, not offer-letter gross. Re-run payments +1–2% rate. If the budget only works at teaser rates, it does not work.
## Stack risk
A clean mortgage plus a quiet car loan plus BNPL is still a stack. List all fixed payments with Debt comparison. Approval is not the same as wisdom — especially under model ie-paye-usc-prsi assumptions used for education on this site.
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Note: Educational content from Calcly Ireland. Official sources (Revenue — PAYE simplified; USC bands collapsed.) and licensed professionals take priority in Ireland.