Does refinancing hurt your credit score?

What an NZ credit file actually records

Your credit file is a ledger held by credit reporting agencies, and three kinds of entries matter here:

• Enquiries. A record that a credit provider looked at your file in connection with an application. Hard enquiries are visible to other lenders; soft checks are not.
• Accounts opened and closed. Under comprehensive credit reporting (CCR), participating lenders report the credit accounts you hold: when they open, their type and limit, and when they close.
• Repayment history. CCR also records whether your regular repayments were made on time, month by month. This cuts both ways: missed payments show, and so does a long run of on-time ones.

Negative marks (defaults, missed payments) don't sit on the file forever; they age off over time. The file is a moving picture, not a permanent record.

Soft checks vs hard checks

This distinction does most of the work in this topic, so it's worth being precise. A soft check is a look at your file that isn't tied to a credit application. It doesn't appear to other lenders and doesn't affect your score. A hard check is an enquiry made as part of a full credit application, and it's recorded where other lenders can see it. The short version: looking is free and applying leaves a record.

Leverage's initial assessment runs on a soft check. A hard enquiry enters the picture only if you choose to proceed to a full application with a lender, and you'll know before that happens.

What one refinance adds to your file

Walk through a completed refinance and count the entries:

1. One hard enquiry, from the lender who assessed your full application.
2. One account closed: your old loan, repaid in full at settlement. A cleanly closed loan is a good look on a file, not a bad one.
3. One account opened: the new loan, which starts with no repayment history and builds it from the first payment.

That's the entire footprint. Scoring models may read the new enquiry and the young account as a small, temporary negative. New credit is always an unknown for a while. It's the credit-file equivalent of a scratch, not a dent, and time plus on-time payments cover it.

Notice what's not on the list: the amount you owe doesn't grow (a refinance replaces debt rather than adding to it), and your old loan's on-time history doesn't get erased. To another lender reading the file later, the story is straightforward: a loan taken, paid properly, settled in full, replaced.

Where real damage comes from

The pattern that genuinely hurts a file isn't refinancing. It's shopping with hard applications. Filling in full applications with five or six lenders in a few weeks puts five or six hard enquiries on your file, and a cluster of enquiries reads as someone hunting for credit, which makes every subsequent lender warier. The irony is that each of those applications was probably just comparison shopping, but the file can't tell the difference.

This is the structural reason to compare before applying: one soft-checked assessment across a panel, then one deliberate hard application with the lender whose offer you actually want. Same comparison, one entry instead of six.

How the new loan helps over time

Under CCR, every on-time repayment on the new loan is reported, which means a refinance isn't just a neutral event that fades, it's an ongoing source of positive history. A file showing a settled old loan and a new one paid like clockwork is stronger, not weaker, than one showing a single loan drifting along. If your credit history is thin or bruised, this is one of the few levers that builds it while also potentially costing you less. Our guide to refinancing with bad credit picks up that thread.

Keeping the impact small

• Compare on soft checks, apply on purpose. One hard enquiry for a loan you've already decided is worth it.
• Make sure the numbers clear the bar first. Run your balance, repayment, and remaining term through the savings calculator. It's an illustration, not a quote, but it tells you whether a full application is worth the entry on your file.
• Then set up the new loan to pay on time, every time. Automatic payments on day one turn the new account into a history-builder instead of a risk.

If you want to see where you stand, the two-minute application starts with the soft check. Nothing touches your file until you decide to go further, and whether an offer improves on your current loan depends on your file and the lender's assessment.

Leverage Finance is a lead-generation referral service, not a lender. All lending decisions, rates, and terms are determined by the lender assessing your application. Nothing on this page is financial advice. It's general information about how refinancing works.