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Home Loan Reality Calculator

This calculator answers the real home-buying question: whether the loan still feels comfortable after rate rises, everyday expenses, and lender-style affordability pressure.

Decision report included

Review the decision summary, key metrics, assumptions, and action items, then create a printable report for a lender, broker, household, or client discussion.

Use the report to document the scenario, explain the tradeoff, and agree on the next action.

Inputs

Enter your scenario.

Property price$780,000

The purchase price you are testing.

Deposit$160,000

Cash deposit available.

Current interest rate6.15%

The current loan rate for the repayment estimate.

Rate rise stress test2.00%

Extra rate buffer to test repayment shock.

Loan term30 years

The planned home loan term.

years

Monthly take-home income$9,300

Combined household income after tax that actually lands in your accounts.

Monthly non-loan expenses$4,800

Recurring living costs before the new mortgage repayment.

Decision Summary

Affordability verdict

High risk

Using take-home income, the current repayment leaves $723 after expenses. At a stressed rate of 8.15%, estimated surplus becomes -$114 per month.

This scenario is stretched. Treat the report as a prompt to revisit price, deposit, income, or expense assumptions before applying.

Decision index

Action

Key metric comparison

Monthly repayment$3,777

Surplus after current repayment$723

Repayment shock$837

Stressed surplus from take-home pay-$114

Repayment share of take-home pay40.6%

Monthly repayment

Watch

$3,777

Estimated repayment at the current rate.

Surplus after current repayment

Healthy

$723

Take-home income left after non-loan expenses and the current repayment.

Repayment shock

Action

$837

Extra monthly repayment if the rate rises by 2.0%.

Stressed surplus from take-home pay

Action

-$114

Take-home income left after expenses and the stressed repayment.

Repayment share of take-home pay

Action

40.6%

Current repayment as a share of monthly take-home income.

Stressed share of take-home pay

Action

49.6%

Stressed repayment as a share of monthly take-home income.

Loan-to-take-home ratio

Action

5.6x

Loan size compared with annualised take-home income.

Safe purchase estimate

Watch

$559,867

Estimated purchase price that keeps the stressed repayment inside a take-home income comfort buffer.

Total lifetime cost

Watch

$1,359,797

Principal plus interest over the full term at the current rate.

Comfort score

Action

13/100

Blends take-home cashflow pressure, loan-to-take-home pressure, and safe price gap.

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Assumptions

Review the assumptions behind the result.

Repayments are monthly and interest is modelled as a standard amortising loan.
Monthly take-home income is used for affordability, cashflow, repayment comfort, and ratio metrics.

How To Use The Result

Turn the output into a practical next step.

Use the stress rate field to test the repayment before you commit to a property price.
Review the safe purchase estimate against the property price you are considering.
Export the report if you want a cleaner discussion with a broker or lender.

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