Koskamo

Calculate Australian mortgage repayments and borrowing power

The user receives precise monthly repayment figures and maximum borrowing capacity based on Australian tax rules, living costs, and lender assessment buffers, avoiding generic AI guesses.

How it works

Read-onlyFinance and payments

The agent extracts the user's income, expenses, existing debts, and desired loan parameters. It then calls the estimate_repayments tool to calculate monthly costs and total interest, and estimate_borrowing_power to determine loan capacity by applying Australian tax calculations and lender buffer rates. The agent presents the results with clear attribution to the Arthr calculators.

Prompt

Paste this into an agent that has the servers below connected. Adjust the names and dates to your own.

Prompt for Calculate Australian mortgage repayments and borrowing power
I want to buy a house in Australia. My household income is $150,000, living costs are $60,000/year, and I have $20,000 in existing repayments. I'm looking at a $800,000 loan at 6% interest for 30 years. Calculate my monthly repayments and estimate how much I can actually borrow based on these figures.

MCP servers it needs

Source

The vendor page this playbook is drawn from, and the passage that supports it.

estimate_repayments What would this loan cost me a month? Monthly repayment, total repaid and total interest on a principal-and-interest loan.
Arthr MCP server: mortgage calculators for AI assistants

Each playbook is drawn from the vendor page it cites and reviewed by Koskamo before it is published. Koskamo does not run these servers or your agent: check what each tool will do before you let it act on your accounts.