How accurate is this calculator?

This calculator was built based on real calculators used my reputable banks and mortgage brokers in New Zealand, and as such is a version of the real thing, with results that match those of most major banks and brokers.

Who should be using this calculator?

The calculator is most suited to first home buyers or people looking to buy a new home.

If the calculator says I pass, does that mean my mortgage is approved?

Not exactly. This calculator was built as a guideline to help you establish whether or not you could qualify for a loan that’s big enough to get you that dream house, but it does not constitute a mortgage approval. If you’d like to start off the process of applying for a mortgage, you can contact us, we’d be more than happy to help.

Aren’t apartments a special case?

In terms of affordability (ie what this calculator gives you) – no.

In terms of your deposit – yes. You’ll need at least a 15% if not 20% deposit for an apartment. Shoebox and leasehold apartments need even more.

Can I include income from additional sources like bonuses, commissions, WINZ benefits, rental properties or flatmates?

Yes you can, but that will be something you need to include as a comment when you get in touch with us.

These additional income streams were purposely left out of the calculator as banks and lenders view them quite differently, and we wanted to provide you with a simple, easy to use tool that doesn’t require you to be a trained financial advisor or mortgage broker to work out.

The calculator says my numbers look good! What do I do next?

Phone or email us. It’s time to work on getting formal finance approval so you can hit the open home circuit with confidence.


This calculator will give you genuine information but it’s no substitute for qualified advice, and is intended as a guide. No matter how tempting it might be, please don’t commit to a financial transaction based on the information you receive from this calculator. Talk to someone knowledgeable first even if that’s not us.

What Our Clients Say

Handing over keys
  • “Thank you for absolutely everything you have done in helping us pursue our dream home. The communication, professionalism and efficiency throughout the whole process was above and beyond and because of you we are now proud homeowners. Thank you so much once again we are forever humble and grateful for your service.”

    Haas C & A
    First Home Buyers | Pukekohe – Auckland
  • “Fantastic experience with Best Mortgages. They listened to our requirements and ideas. They were knowledgeable, prompt, flexible and patient, and found us a very good mortgage. They were very helpful and I would absolutely have no hesitation in recommending them to anyone.”

    Corkery B & Z
    First Home Buyers | Mount Albert – Auckland
  • “I just wanted to say that Best Mortgages was very reliable and resourceful. They were always available for advice and explanation on the process I was going through. I like that they were straight forward and that they did not waste time on unnecessary explanations. I will definitely recommend them to friends and family.”

    Property Investor | Clevedon – Auckland