How debt affects your retirement — and what to do about it.

For many New Zealanders, the path to retirement runs alongside debt rather than away from it. Having a clear picture of the retirement target you're working toward makes the debt question far easier to prioritise. Mortgages that aren't fully paid off, car loans, credit card balances, buy-now-pay-later commitments — the forms vary, but the effect is consistent: debt carried into retirement reduces the income available for living, limits financial flexibility, and adds a layer of obligation to a chapter of life that most people hope will feel free.

Understanding how debt interacts with retirement — and approaching it as a deliberate planning question rather than something to hope works itself out — makes a significant difference to how retirement actually feels when it arrives.

The real cost of debt in retirement

The most obvious cost of debt in retirement is the interest. Every dollar of interest paid on a loan is a dollar not available for living costs, experiences, or the unexpected expenses that retirement reliably produces.

But there is a less obvious cost that matters just as much: the psychological weight of obligation. Retirement is meant to be a period of freedom — the point at which financial commitments have been met and time becomes genuinely your own. Carrying debt into that period doesn't just reduce income; it reduces the sense of freedom that makes retirement feel like retirement. This is why reducing debt before retirement is worth treating as a genuine priority — not just for the financial benefit, but for the quality of the retirement it enables.

Not all debt is equal

Different types of debt carry different costs and deserve different approaches.

High-interest consumer debt — credit cards, store cards, buy-now-pay-later arrangements — is the most costly and the most urgent to address. Interest rates on this type of debt typically far exceed any realistic investment return, which means paying it off is almost always the best available use of spare money.

Car loans and personal loans carry lower rates but are still worth clearing before retirement where possible, since the asset they fund depreciates while the obligation persists.

Mortgages are the most complex case, as discussed in our earlier article on mortgage versus retirement savings. Owning your home free of debt by retirement significantly reduces the income needed to live well — which in turn reduces the savings required to fund that lifestyle.

The connection between spending and debt

Debt is, in most cases, the financial trace of spending that exceeded income. This is not a moral judgement — some debt reflects deliberate and reasonable decisions, and the structural pressures that lead people into debt are real. But consumer debt in particular tends to reflect a pattern of spending that outpaced what income could support.

This is where conscious spending connects directly to debt. A household that has examined its spending honestly — that knows what genuinely adds to daily life and has reduced what doesn't — is less likely to accumulate new debt and more likely to have the resource to address existing debt steadily. Reducing spending and reducing debt are not separate tasks. They are often the same task approached from different angles.

There is a retirement planning dimension here too. Every dollar of discretionary spending reduced is a dollar that doesn't need to be replaced by retirement income later. A household retiring on $50,000 a year has a very different retirement challenge from one needing $70,000 — and the difference often comes down not to need, but to habit. For more on how NZ Super fits into the picture, see NZ Superannuation: everything you need to know.

A practical approach

A few principles tend to produce the best outcomes for those carrying debt into the years before retirement.

Address high-interest debt first, always. The guaranteed return of eliminating high-interest debt outweighs almost any investment alternative. This is the financial priority above all others.

Make mortgage payoff a retirement planning target. Rather than treating it as something that will happen eventually, set a specific target date — ideally at or before retirement — and work backward to understand what extra payments are required.

Stop accumulating new consumer debt. This requires an honest look at spending patterns. Understanding why consumer debt accumulates is as important as addressing what already exists.

When there are no loan repayments and no outstanding obligations, the income needed to live well in retirement falls — sometimes significantly. NZ Super stretches further, savings last longer, and the sense of freedom most people imagine when they picture retirement is genuinely available. Getting there requires deliberate choices, but it is reachable — and the path is clearer than most people expect once they can see it.

See your full picture

ThatDay is a free retirement planning platform built for New Zealanders. It helps you understand your full retirement picture — including what different savings and spending choices mean for your retirement timeline and the income you'll need.

Its financial assumptions were independently validated by the University of Auckland Business School's Master of Applied Finance programme.

See your retirement picture clearly — start your free plan at thatday.co.nz

Further reading: How debt affects your retirement

When professional advice helps

For households with complex debt situations — multiple loans, significant consumer debt alongside a mortgage, or retirement timelines that feel tight — a conversation with a financial adviser is worth having. ThatDay's financial services partners include advisers experienced in helping people navigate exactly these situations.