Serviceability Calculator

Estimate borrowing power based on income, expenses, debts, and assessment rate.

SECTION 0: Quick Actions
Copy Results includes a clean summary (assessable income, expenses, debts, assessment rate, borrowing power).
SECTION 1: Income (Gross / Assessable)
SECTION 2: Household & Living Expenses
SECTION 3: Existing Debts & Commitments (Monthly)
SECTION 4: New Loan Settings (Borrowing Power)
SECTION 5: Serviceability Controls
SECTION 6: What-If Scenarios
These apply instantly and appear in the Scenario chart + PDF scenario table.
Comfortable
Assessable Monthly Income
AUD 0
Monthly Living Expenses
AUD 0
Monthly Existing Commitments (incl. assessed CC)
AUD 0
Monthly Surplus
AUD 0
Affordable New Repayment (after usage factor)
AUD 0
Estimated Borrowing Power (Max Loan Amount)
AUD 0
Assessment rate
0.00%
Usage factor
0%
Estimated max repayment/month
AUD 0
Borrowing power (P&I)
AUD 0
Pass/Fail note: Comfortable
Breakdown (Formulas)
assessableIncomeMonthly = assessableAnnual / 12
assessableAnnual = baseSalary + bonus × bonusAssessable% + max(0, rentalIncome − rentalExpenses) × rentalAssessable% + otherIncome
expensesMonthly = manualExpensesMonthly OR benchmark(householdSize, lifestyle)
assessedCC = creditCardLimit × (ccAssessPct / 100)
commitmentsMonthly = existingLoans + car + personal + HECS + childSupport + assessedCC
surplus = income − expenses − commitments
affordableRepayment = max(0, surplus × usageFactor) (and reduced if minimum leftover buffer is set)
assessmentRate = max(actualRate + buffer, floor)
borrowingPower (P&I): principal = M × ((1+r)^n − 1) / (r × (1+r)^n), where r = assessmentRate/12 and n = termYears×12
Charts
Recommendations
Disclaimer: Estimates only; lenders vary.
PDF Export
Export includes inputs summary, results, scenario table, disclaimer, and “Powered by GetMortgageWebsite.com”.