Willis has pitched her second Budget as “growth without blow-outs”. Treasury still expects GDP to expand 2.1%-2.6% a year and return to surplus by 2027, but the Government’s three headline levers will touch almost every household and balance-sheet in the country. The KiwiSaver tweaks save the Crown about $2.4bn over four years, the Investment Boost costs $1.7bn per annum, and restoring full mortgage-interest deductibility trims revenue by roughly $600m a year.

KiwiSaver — more skin in the game

From July 2025 the Government member tax credit (MTC) falls from 50 cents to 25 cents for every $1 you contribute, cutting the potential top-up from $521.43 to $260.72. Anyone earning more than $180 000 loses the subsidy entirely.

Default employee and employer contribution rates rise from 3% to 3.5% on 1 April 2026 and again to 4% on 1 April 2028. Employees may “opt-down” to 3% temporarily, but that choice will need to be renewed each year.

KiwiSaver eligibility is extended to 16- and 17-year-olds, giving teens the chance to build balances sooner and enjoy employer matching.

Why it matters

The halved MTC still delivers a 25% instant return for contributors under $180 k, but high-income earners lose a valuable sweetener. The phased contribution hike will funnel an extra $1.2bn a year into capital markets once fully bedded in, according to Treasury modelling, though wage negotiations may absorb some of the burden. Advisers should revisit client budgets—especially for households already stretched by high mortgage repayments—to ensure the extra payroll deduction does not cause short-term stress.

“Investment Boost” — Capex accelerant

From royal assent (22 May 2025) businesses can immediately deduct 20% of the cost of qualifying new productive assets (plant, vehicles, technology, commercial buildings), then depreciate the remaining 80% as usual. The policy is deliberately front-loaded to lift near-term capital formation and mirror Australia’s temporary full-expensing regime.

Why it matters

SMEs with lumpy capital pipelines—agribusiness, manufacturing, logistics—are the clear winners. A $500 000 piece of equipment bought this year will generate a $100 000 upfront deduction, boosting post-tax cash-flow by up to $28 000 (at a 28% company rate). Expect a spike in capex guidance and slightly leaner free-cash yields in FY-25, followed by improved margins as depreciation normalises. Equity investors should watch listed mid-caps for accelerated growth plans and short-term dividend restraint.

Working for Families tweak

From 1 April 2026 the family-income threshold for Working for Families rises from $42 700 to $44 900 while the abatement rate edges up from 27 % to 27.5 %. Treasury modelling shows about 142 000 low- and middle-income families will receive an average $14 a fortnight extra. The cost is largely offset by the slightly faster claw-back above the new threshold.

Why it matters

For households earning under $100 000 this is a small but immediate cash-flow boost—roughly $364 a year—that can be channelled into emergency savings, school costs or KiwiSaver top-ups.

Inland Revenue compliance funding

Budget 2025 commits an extra $35 m a year to Inland Revenue’s audit and debt-collection programme while locking in the earlier $27 m boost that would otherwise have expired in June 2025. Ministers say the new money will expand risk-review teams and digital-forensics capacity, building on last year’s yield: 3 600 audits in the July-December half found around $600 m in undeclared tax.

Why it matters

With fresh funding and permanent head-count Inland Revenue now has a clear mandate—and the resources—to escalate scrutiny of “cash-flow sensitive” areas: residential-rental losses, GST accuracy, trust distributions and shareholder-employee salaries. Taxayers should pre-empt surprises by double-checking record-keeping, reconciling loan-interest claims to source documents and stress-testing any aggressive structures against general anti-avoidance rules. A quick compliance health-check now could save weeks of distraction and costly shortfall penalties later.

Things to think about

• Young savers (16-17): earlier employer and government top-ups will accelerate compounding wealth over time and provides better incentive to start young.
• SMEs: 20% write-off smooths the hurdle rate for new assets and may help lift productivity.
• High-income employees (> $180k): loss of the MTC reduces KiwiSaver’s relative attractiveness but not materially.
• Squeezed households: KiwiSaver contribution increases may bite; review budgets and consider deferring if needed.