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Auckland International Airport (AIA) / HY25

NPAT up 57.8% but cash conversion fell to 46.3% on capex surge

Strong P&L growth contrasts with a NZ$315.7m pre-lease FCF deficit, both classified below the company's historical range.

Transport & Infrastructure / Airports

AIA revenue trajectory

Revenue context before the current result.

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HY26 was $519.6m, versus $1b in FY25.

AIA EBITDAF margin

EBITDAF margin across covered periods.

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  • HY23 AIA: Unprecedented low ebitda margin. 34%; 4-period range 47.8% to 80.7%. EBITDA margin: 34.0%, unprecedented low; 4-period mean 67.6%, range 47.8%-80.7%.
  • FY23 AIA: Outside range low ebitda margin. 63.4%; 4-period range 65.2% to 252.3%. EBITDA margin: 63.4%, below normal range; 4-period mean 127.9%, range 65.2%-252.3%.
  • HY25 AIA: Outside range high ebitda margin. 80.7%; 4-period range 34% to 71.5%. EBITDA margin: 80.7%, above normal range; 4-period mean 55.9%, range 34.0%-71.5%.
EBITDA margin: 80.7%, above normal range; 4-period mean 55.9%, range 34.0%-71.5%.

AIA operating cash flow

Operating cash flow across covered periods.

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HY26 was $185.4m, versus $474.3m in FY25.

AIA working-capital movement

Operating working-capital absorption or release by reporting period.

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  • FY21 AIA: Outside range high operating working-capital movement. $10.5m; 4-period range $-15.9m to $8m. Operating working-capital movement: NZ$10.5m, above normal range; 3/4 prior periods had builds averaging NZ$3.5m, and 1 had releases averaging NZ$-15.9m.
  • HY22 AIA: Unprecedented low operating working-capital movement. $-20.8m; 4-period range $3.1m to $30.7m. Operating working-capital movement: NZ$-20.8m, unprecedented low; 4/4 prior periods had builds averaging NZ$16.3m, and none had a working-capital release.
  • FY22 AIA: Unprecedented low operating working-capital movement. $-15.9m; 4-period range $1.2m to $10.5m. Operating working-capital movement: NZ$-15.9m, unprecedented low; 4/4 prior periods had builds averaging NZ$5.3m, and none had a working-capital release.
  • HY25 AIA: Outside range high operating working-capital movement. $30.7m; 4-period range $-20.8m to $23.1m. Operating working-capital movement: NZ$30.7m, above normal range; 3/4 prior periods had builds averaging NZ$11.5m, and 1 had releases averaging NZ$-20.8m.
Operating working-capital movement: NZ$30.7m, above normal range; 3/4 prior periods had builds averaging NZ$11.5m, and 1 had releases averaging NZ$-20.8m.
Release date
20 February 2025
Published
22 April 2026
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Key metrics

Numbers worth scanning first

HY25 vs HY24

Revenue

$499.9m

+13.5% ↑ vs $440.5m

EBITDA

$403.1m

+29.9% ↑ vs $310.2m

Net profit after tax

$187.3m

+57.8% ↑ vs $118.7m

Net cash inflow from operating activities

$186.6m

-10.8% ↓ vs $209.1m

Interim dividend per share

6.3c

-7.4% ↓ vs 6.8c

Operating profit

$303.9m

+49.6% ↑ vs $203.2m

Profit before tax

$260m

+52.9% ↑ vs $170.1m

Cash and cash equivalents

$464.4m

Suppressed: metric quality flags mark this value as unsuitable for normal comparison.

What changed

The headline P&L moved sharply ahead, but cash quality went the other way

Operating cash flow fell to NZ$186.6m from NZ$209.1m, dropping the OCF/EBITDA ratio to 46.3% from 67.4%. Annolyse's historical baseline puts cash conversion at a 60.2% mean over the prior four halves, with a 49.1%–74.2% range, so the current reading sits below that band.

Pre-lease free cash flow widened to a NZ$315.7m deficit from NZ$242.4m, NZ$153.9m worse than the historical mean of -NZ$161.8m and the weakest in the supplied four-period window. Capex of NZ$502.3m equalled 100.5% of revenue. Working capital absorbed NZ$30.7m as trade debtors rose 59.5% to NZ$82.3m and receivable days stretched to 30.0 from 21.4.

Against that, revenue grew 13.5% to NZ$499.9m, PBT rose 52.9% to NZ$260.0m and NPAT rose 57.8% to NZ$187.3m. Net debt/EBITDA improved to 4.96x from 7.01x and the cash balance jumped to NZ$464.4m from NZ$57.9m, evidently financing-supported.

What matters

Cash conversion has stepped down materially

At 46.3%, OCF/EBITDA sits below the supplied historical range and 21 percentage points below the prior comparable. Receivables growth running roughly 4x revenue growth is the proximate cause and means a meaningful portion of the reported EBITDA expansion has not yet been collected.

The investment cycle is at its deepest point in the supplied window. Capex of NZ$502.3m exceeded revenue and drove the pre-lease FCF deficit to its worst level on the four-period baseline. The dividend was cut to 6.25cps from 6.75cps and the payout ratio fell to 51.9% from 83.8%, consistent with a board preserving cash for the build programme.

Reported EBITDA margin sits well outside the historical range. At 80.7%, EBITDA margin is 16.8 points above the four-period mean of 63.9% and above the 47.8%–71.5% range. Part of that gap reflects definitional change: the prior comparable was disclosed as EBITDAFI, where the F captures fair value adjustments stripped out of the current EBITDA line. Like-for-like operating leverage is therefore harder to verify than the headline implies.

Expectations

No stated target is supplied for FY25

The shape context shows HY24 contributed 49.2% of FY24 revenue and 50.5% of FY24 EBITDAF, so a roughly balanced second half on revenue and EBITDA is the historical pattern. FY24 NPAT shape is uninformative because the second half ran a NZ$113.2m loss, almost certainly fair value-driven, which is what makes prior-period comparison difficult.

The release does not tell us how much of the FY25 capex programme is still ahead, so the second-half FCF profile cannot be sized from this filing. The improved leverage ratio is real, but it is a balance-sheet outcome of the cash raise, not of operating cash generation.

Quality of result

The PBT result of +52.9% is the cleaner operating read, with the effective tax rate at 28.0% versus 30.2% prior absorbing some of the gap to NPAT

Revenue +13.5% with EBITDA +29.9% does suggest genuine operating leverage on aeronautical and retail throughput, but the EBITDA margin sitting outside the historical range and the EBITDAFI-versus-EBITDA labelling change argue for treating the margin step-up cautiously until like-for-like reconciliation is visible.

The cash side is weaker than the P&L. FCF/NPAT at -168.6% reflects the heavy capex phase rather than a one-off, but the additional drag from working capital is timing-driven and recoverable only if receivables normalise. The board's 7.4% dividend cut and the lower NPAT payout ratio of 51.9% are consistent with management treating the current cash profile as constrained, even with leverage at 4.96x looking favourable versus the four-period mean of 11.23x.

Unresolved

Open questions

What share of the NZ$30.7m receivables build is collectable in 2H25, and was any of it tied to a single counterparty or aeronautical billing cycle change?
Why did EBITDA margin reach 80.7% against a 63.9% historical mean, and how much of the gap is the EBITDA-versus-EBITDAFI definitional shift rather than underlying margin?
How much FY25 capex remains, and what is the run-rate expected once the current terminal and infrastructure programme rolls off?
Is the 6.25cps interim a step-down to a sustained level through the heavy-capex period, or a one-period adjustment?
What share of the NZ$464.4m cash balance is committed to near-term capex versus available liquidity?

This briefing cannot assess passenger volume trends, project completion timing, or the regulated aeronautical pricing reset, none of which are quantified in the supplied release excerpts.

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Ask about AIA HY25

Ask follow-up questions about Auckland International Airport's HY25 result.

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Informational only. No buy, sell, hold, price-target, or personal financial advice.

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Sign in to ask questions about Auckland International Airport's HY25 result.

What share of the NZ$30.7m receivables build is collectable in 2H25, and was any of it tied to a single counterparty or aeronautical billing cycle change?Why does "Cash conversion has stepped down materially" matter?How strong was the cash and earnings quality in HY25?What should I watch next for AIA after HY25?

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Data appendix

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Sources

Current period

AIA - FY25 Interim Results Announcement

HY25 / results announcement↗

AIA - FY25 Interim Results Market Release

HY25 / results release↗

AIA - FY25 Interim Results Presentation

HY25 / results presentation↗

AYA - FY25 Interim Results Financial Statements

HY25 / financial report↗

Prior comparable period

AIA - FY24 Interim Results Announcement

HY24 / results announcement↗

AIA - FY24 Interim Results Financial Statements

HY24 / financial report↗

AIA - FY24 Interim Results Market Release

HY24 / results release↗

Full-year context

AIA - FY24 Annual Report

FY24 / financial report↗

AIA - FY24 Annual Results Market Release

FY24 / results release↗

AIA - FY24 Results Announcement

FY24 / results announcement↗

Release context

AIA - 2024 Annual Meeting: Chair & Chief Executive addresses

HY25 / commentary↗

AIA - Webcast details for FY25 Interim Results

HY25 / commentary↗

Related insights

Cross-company views selected from the metrics in this briefing.

Cash conversion quality

This result converted 46.3% of EBITDA to operating cash flow, -21.1pp versus the prior comparable period.

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Earnings quality and statutory distortions

PBT and NPAT growth diverged by 4.9pp, with a distortion flag in the result.

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Leverage and balance-sheet risk

Net debt / EBITDA is 4.96x, -2.05x versus the prior comparable period.

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Dividend coverage and payout pressure

Dividend payout versus NPAT is 51.9%.

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This briefing is based on available company filings and standard Annolyse calculations. It is general information only and does not constitute financial advice. The analysis may contain errors. Always read the original company filings and consult a licensed financial adviser before making investment decisions.

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