We know that the limitations of serviceability calculators are an industry wide problem, so we’re taking steps to fix it. 

Rather than relying on third-party providers, we’ve been re-building our own servicing engine to create lender-specific calculators that consistently deliver accurate results. 

We’re thrilled to announce the following lenders have been switched to the new Mercury servicing engine:  

• Bank West
• NAB
• Westpac

You don't have to do anything to enable the new calculations, they have already replaced the previous ones in your results. 

You should see significantly more accurate results for these lenders, and over the next few weeks we’re updating the rest of our calculators. As we upgrade the calculators for other lenders, we’ll announce it via the usual channels. 

We’ve also added some new fields to support the new calculations. Learn about these on the wiki.