Mortgage calculators

Our free mortgage calculators are a great place to start when you're thinking about buying, refinancing, or simply getting on top of the loan you already have. Once you've run the numbers and are ready to turn the numbers into a plan, our mortgage advisers are here to help.
Iad showing calculator for mortgage investment savings and insurance

Calculate your mortgage repayments

How much will my mortgage cost?

Your repayments come down to three things: how much you borrow, your interest rate, and the length of your loan. The calculators let you try different combinations and see how each one changes your repayments and the total interest you'd pay over the life of the loan. It's a good way to get a feel for what's comfortable, and our advisers can help you turn those numbers into a plan that works for you.

Loan calculators only give you an indication 

Calculators give you the numbers, but we make sense of them. With so much to consider, it's worth getting personal advice based on your own circumstances.  We do more than negotiate a great loan with a bank - we can advise you on how to structure your mortgage repayments to get that loan paid off faster. We find what works for your life, not just today but over the years ahead.

Meet our mortgage experts

Our mortgage team of Stuart Pope, Chevaun Marshall, Melaine Riley and Rebecca Gray bring years of professional experience. We can review your existing mortgage structure and interest rates and then let you know if we can do any better for you.
Book an initial, no obligation appointment with us today
Stuart Pope
Mortgage Adviser
mortgages@castletrust.co.nz

Stuart is a senior Mortgage Adviser with over 25 years in the lending industry. Known for his strategic loan structuring and clear communication, he supports clients from first-home buyers to investors. A member of Financial Advice NZ, Stuart is dedicated to smart, client-focused lending solutions.

More about Stuart
Stuart Pope, mortgage advisor
Stuart Pope
Mortgage Adviser

Stuart is a highly experienced mortgage adviser with over 25 years in the lending industry. He’s worked with clients ranging from first-home buyers to seasoned investors and is known for his positive approach and expert knowledge.

After running a successful mortgage brokerage, Stuart became a tutor for the NZQA Certificate in Money Management before returning to mortgage advice.

He now helps clients navigate the lending process with clarity and confidence, from initial application through to long-term planning. His focus is on building the right loan structure and achieving the best outcomes, especially in complex or multi-property scenarios.

Stuart’s deep understanding of the lending landscape means he can find smart, personalised solutions to suit a variety of financial goals.
He is a member of Financial Advice New Zealand and remains committed to staying current with industry trends and best practices.

Book with Stuart
Chevaun Marshall
Mortgage Adviser. BBus, CPA
mortgages@castletrust.co.nz

Chevaun is a Mortgage Adviser and Chartered Accountant (CPA), with a Bachelor of Business in Accounting. She combines lending expertise with financial insight to help clients, from first-home buyers to investors, make confident, well-informed decisions that support long-term financial goals.

More about Chevaun
Chevaun Marshall, mortgage advisor
Chevaun Marshall
Mortgage Adviser. BBus, CPA

Chevaun is a qualified Mortgage Adviser and Chartered Accountant (CPA) with a background in property, lending, and accounting. She holds a Bachelor of Business majoring in Accounting and previously worked for a large property investment firm in Brisbane.

Her dual expertise in finance and accounting gives her a broad perspective on how lending decisions impact overall financial strategy.
Chevaun works with a wide range of clients, from first-home buyers to experienced investors, offering clear advice, tailored loan structures, and a strong attention to detail.

She is passionate about helping clients make confident, informed decisions that align with their long-term goals.

Based in Nelson, Chevaun balances her mortgage work with running her own business and raising a busy family with two young children.

Her practical, relatable approach makes her a trusted partner for clients navigating today’s property and lending landscape.

Book with Chevaun
Melanie Riley
Mortgage Adviser
mortgages@castletrust.co.nz

Mel is a Mortgage Adviser holding her New Zealand Certificate in Financial Services and has over a decade of experience in the financial services industry. With a background in business ownership, she helps clients confidently navigate home lending –  from first homes to refinancing.

More about Melanie
Melanie Riley
Melanie Riley
Mortgage Adviser

Mel has been part of the Castle Trust team since 2014 and holds her New Zealand Level 5 Certificate in Financial Services. She began her journey with Castle Trust in a client support role, gaining hands-on experience in insurance, investments and mortgages while completing her financial adviser qualifications.

Before moving into financial services, Mel owned and operated a successful retail business in Motueka. This experience gives her a practical understanding of the financial challenges individuals and families face, particularly around home lending and budgeting.

Over the past decade, Mel has supported hundreds of Castle Trust clients through key life stages. As a mortgage broker, she brings deep technical knowledge and a strong client-first approach to every interaction.

Mel helps clients feel confident and informed as they navigate the lending process, whether they’re buying their first home, refinancing, or planning their next move.

Book with Melanie
Castle Trust Team

Your better financial future starts here

Your better financial future starts with a conversation with one of our financial experts. We offer 30 minutes free consultations to help give you peace of mind that we can help you where you need it most.
Book now

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