Debt or deposit first? It is one of the questions I hear most from people planning to buy a home. Clearing every debt before saving a dollar feels like the responsible move. It is not always the most effective one. Paying down debt and building a deposit do not have to compete, as long as the order makes sense.
Why paying off every debt first does not always work
Treating all debt the same can stall a home-buying plan. Racing to clear every balance can mean years pass with no deposit progress. Not every debt affects a lender’s view equally, though. Some debts carry a lot of weight in an application. Others carry far less. That difference sits at the heart of the debt or deposit first question.
Debt or deposit first: how lenders weigh existing debt
Most debt advice focuses on interest rate. The most expensive debt gets cleared first. That approach is sound for keeping total interest low. When a mortgage is the goal, it is only part of the picture.
Lenders tend to run two separate checks on existing debt. The first is serviceability, which is the bank’s own test of monthly cash flow. Every repayment reduces the income left over to support a new loan. A high monthly repayment can weigh heavily here, even on a lower interest rate.
The second is the Reserve Bank’s debt-to-income (DTI) settings, in place since 1 July 2024. DTI compares total debt with gross income. Personal loans, car loans and credit card limits all count. Lending above six times income for owner-occupiers, or seven for investors, is limited to a small share of new lending.
These two checks work differently, and both carry real weight. A small balance with a hefty repayment can pinch serviceability. A large balance with a modest repayment can push up DTI instead. Many lenders assess a credit card on its limit, not its balance. A card cleared each month can still count. Which check matters more depends on the individual’s income, debts and plans.
Running debt repayment and deposit saving together
For many people, the answer is not debt first then deposit, or deposit first then debt. Plenty of people run both at once. Extra repayments lean toward whichever debt is doing the most to limit borrowing capacity. Deposit savings keep building in parallel. The right balance depends heavily on income, existing debt, and timeline.
Common patterns that stall people out
A few patterns show up again and again. Minimum repayments sit on autopilot for years. Some people add new debt while still paying off the old. Others put off any progress because the full picture feels overwhelming. Momentum tends to matter more than perfection.
Why the right order is personal
There is no single sequence that suits everyone. It depends on income, existing debt, timeline and what a lender weighs most heavily in each situation. That is why debt or deposit first rarely has a one-size-fits-all answer. A general article only goes so far. A conversation about your own numbers tends to be worth far more than a generic checklist.
This article is part of the “What’s Really Holding You Back?” series. Anyone joining midway can catch up on the earlier articles: the series introduction, good debt vs bad debt, personal loans and mortgage applications, whether an owner occupier home is an asset and how a car loan affects a mortgage application. The final article in the series, debt consolidation, looks at how lenders read a consolidation loan. Reading the whole series gives the full picture of how debt interacts with a mortgage application.
Want to know what this actually means for you?
This is general education, but your situation isn’t general. If you want to work through your own debt and deposit timeline, I’m happy to have a no-obligation chat. As a mortgage adviser operating under Guardian Smith’s FAP (FSP1002543, individual registration FSP1012174), I can walk you through it properly.
Call 0226584350 or email chris@guardiansmith.co.nz to book a time.
Chris Thompson
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This article is general information only and does not take into account your personal financial situation, goals or needs. It is not financial advice. For guidance specific to your circumstances, a licensed financial adviser can help.