Infrastructure debt: how to tell if your council actually has a plan

Somewhere in your council's area, there is a water main that was laid in the 1960s. It has exceeded its design life. It will leak, or burst, or quietly contaminate supply at some point in the not-too-distant future. The council knows it's there. Replacing it is expensive. So is not replacing it.

That pipe — and hundreds of thousands like it across the country — is the physical form of New Zealand's infrastructure debt. It is not a metaphor. It is a real object with a real cost attached to it, and the question is not whether that cost will be paid, but when and by whom.

How the hole got dug - briefly

Infrastructure debt doesn't announce itself. It builds up in the gap between what councils spend keeping their assets working and what they'd need to spend to actually keep up. Local Government New Zealand and Infrastructure New Zealand put that gap at around $200 billion nationally - deferred work across water, wastewater, stormwater, roads, and community facilities.

Two things made it worse. First, timing: most of New Zealand's core pipes and roads were built in a compressed burst from the 1950s to the 1970s, designed to last 50 to 80 years. That replacement window is landing now - clustered, rather than spread across a century. Second, accounting: councils weren't legally required to fund depreciation - to set money aside to replace ageing assets - until 1996. Before that, rates were kept low, assets wore out, and the replacement bill accumulated invisibly.

A pipe that costs $1 to fix today can cost $4 to $6 to fix once it fails. Deferred maintenance is never free - it's just deferred payment, with interest.

That's the backdrop. It's real, and it's expensive. But none of it tells you whether your council is handling it well or badly - and that's the part you can actually find out.

Three questions that tell you if your council has a plan

The national deficit is a number you can't do anything about. Your council's response to it is a set of choices you can read, in documents they're legally required to publish. Three questions cut through it.

1. Intent vs execution: do they build what they promise?

Open any Long-Term Plan (LTP) and you'll find a large capital works programme - dozens of pipe and road renewals, each with a dollar figure attached. But a budget is intent, not delivery. For years the Auditor-General has found councils spending well below what they budgeted: in 2021/22, councils collectively spent just 76% of their planned capital expenditure.

That's usually not a lack of will - it's a lack of capacity. There aren't enough engineering firms, civil contractors, materials, or consenting throughput to physically deliver the work in the year it's funded. Which means your council can be rating you for renewals it is structurally unable to build.

2. Depreciation vs cash: is the "renewals gap" real, or just accounting?

You'll often hear that councils spend less on renewals than their assets depreciate - around 84% of depreciation across the sector in 2024. On its face that sounds like falling behind on physical decay. Sometimes it is. Often it isn't.

Depreciation is a non-cash accounting estimate: it spreads an asset's book value over a theoretical lifespan. It is not a measure of how fast a specific pipe is actually rusting. A council with a relatively young or recently renewed network can legitimately spend well below 100% of depreciation, because the assets genuinely don't need replacing yet - spending the full amount anyway would just be stockpiling cash off your rates.

The document that tells you which it is is the Financial Strategy, which every council must publish in its LTP under section 101A of the Local Government Act 2002. It sets out whether the council funds depreciation from current rates or debt-funds renewals later, when the assets actually age.

3. The escape valve: where does the water debt sit?

The government plans to cap general rates increases at 2-4% a year: the regulations become law from January 2027, the caps themselves take effect from the 2029 financial year, and councils' 2027 long-term plans must already be built to comply. The pressure behind the policy is real - rates rose around 35% cumulatively in three years - but a cap creates its own problem. S&P Global Ratings, which rates 24 New Zealand councils, found 18 of them projecting rate increases above 4% in every year from 2025 to 2029. If they can't raise the revenue, the options narrow to cutting services, borrowing more, or deferring maintenance again - the exact move that dug the hole in the first place.

But the cap doesn't sit in isolation. Under Local Water Done Well - the framework that replaced the previous government's scrapped Three Waters reforms - councils can move water, wastewater, and stormwater into a separate council-owned water organisation, and that changes the borrowing maths. A standard council's debt is capped by the Local Government Funding Agency (LGFA) at around 280% of revenue; a dedicated water organisation can borrow up to 500% of its operating revenue. Shifting water onto a separate balance sheet frees up the council's own headroom to absorb the rate cap without gutting roading or community services.

It's not a magic wand. The pipes are the same age, the cost is the same, and you - the ratepayer - are still the ultimate funder, whether you pay through rates or a water bill. Decoupling buys borrowing capacity and spreads the cost over time; it doesn't make the cost disappear. But whether your council has taken that option, or kept water on its rate-capped books, tells you how much room it has to manoeuvre.

The part that doesn't have a clean answer

Underneath the mechanics is a question of fairness across generations. The communities that built these systems in the 1960s got decades of service from assets they never fully funded the replacement of. Today's ratepayers are being asked to pay for current services and to refill that tank. You can't send a rates bill back to 1975.

So the honest question was never whether to pay - it's whether to pay steadily now or pay much more later, and whether the money you hand over is actually being turned into renewed pipes and roads. The three checks above won't lower your bill. But they'll tell you, with evidence rather than outrage, whether your council is managing the problem or quietly passing a bigger one to whoever lives in your house next.