How to Use ESG Data to Fight Rising Insurance Premiums: A Practical Guide for Asset Managers

I know from personal experience that getting hit with another steep insurance renewal feels like more than just a line item. It’s a direct hit to your returns that makes every investment decision harder.

For asset managers and property portfolio owners, recent jumps in premiums have felt like a tax on our buildings. Australian property premiums rose by 14% on average in 2025. That’s the largest annual hike in a decade. 

This guide shows how structured ESG and climate data could deliver a groundbreaking way to push back on increases, rather than just documenting them.

Key Takeaways:

• Insurers now treat your sustainability disclosures as a proxy for management quality. Strong data correlates with lower claims and better pricing.

• Building a defensible risk narrative allows you to proactively challenge unfair premium hikes with technical evidence of your building’s resilience.

• Technical tools like Acumentis Armour move your portfolio from a generic risk category into a verified, well-managed asset class.

Why your insurance premiums are rising

Extreme weather and a record run of claims are forcing insurers to re-think how they price your buildings. They aren’t just guessing anymore. They’re using spatial data to find every weak point in your portfolio.

Australian insured losses from natural disasters hit $1.97 billion in 2025. The impact of climate risk on insurance premiums and availability is now visible in every major asset class. Insurers are baking those facts into your premiums right now.

The Insurance Council forecasts that climate-related weather costs will reach $35.2 billion annually by 2050. This isn’t a future-risk discussion. It’s a current-cost reality for asset-heavy portfolios. You need to use your data to change the narrative today. 

How to use ESG data to fight rising premiums

Insurers see climate risks, and they’re pricing them in. Here’s how to shift your risk profile using better quality, structured data.

1. Map which assets are driving your premium spike

• You’ve got to know what the underwriter is seeing.
• Group your assets by their risk buckets, such as flood-prone coasts, bushfire-exposed zones, or high-heat industrial sites.
• When you show an insurer that you understand these drivers, you prove you’re an informed owner who’s on top of the details.

2. Collect the metrics insurers actually use

• Underwriters want technical facts rather than vague promises.
• Collect flood-zone exposure, wildfire-risk ratings, and heat-stress thresholds.
• Focus on governance data like board oversight of climate risk and a clean incident history.

3. Build a risk narrative for each key asset

• Turn raw scores into a short story for every major building in your portfolio.
• Providing a detailed climate risk analysis that insurance firms can trust is much more effective than a generic report.
• Use this as a proactive negotiation tool instead of just another compliance report.

4. Use ESG data as a negotiation lever

• Use your strong ESG scores to prove that your buildings have fewer claims.
• Negotiate for concrete rewards like capped rate increases or narrower exclusions.
• Show the insurer that your better governance means fewer headaches for their own claims team.

5. Embed ESG questions into your insurance RFPs

• Demand that your broker includes the ESG conversation in your next renewal.
• Ask insurers exactly how they use climate data to determine your specific pricing.
• Find out if they offer discounts or better coverage for buildings with high energy ratings or proven resilience.

6. Invest in improvements that insurers can quantify

• Prioritise the building fixes that insurers can actually measure and verify.
• Focus on upgraded sprinkler systems, flood barriers, and energy efficiency moves.
• Document every change with clear KPIs so the risk-reduction is traceable for the underwriter.

7. Create an ongoing feedback loop

• Request a feedback letter from the insurer to see which factors most influenced their pricing.
• Use these insights to refine your data collection for the next year.
• Adjust your strategy early so you’re better prepared before the next renewal cycle starts.

Why this matters for your portfolio

For property managers, ESG-driven upgrades like water resilience and fire safety can directly lower your insurance costs. ESG for property is now a tool for protecting your profit. Plus, using sustainable property solutions makes your buildings more attractive to lenders who are also checking your climate risk.

For infrastructure managers, long-term resilience planning is even more critical. Assets designed to last 30 to 50 years must withstand intensifying heat and storms. A verified resilience strategy helps in securing your property portfolio insurance for the long haul.

Our Climate & Urban Resilience Advisory turns these risks into a defensible strategy for your next renewal. Explore how the Acumentis Armour platform maps your hazards and protects your EBITDA today.

Why asset managers hit a wall with DIY reporting

Most of us want to keep this in-house to save a bit of budget. But property management is already a flat-out job. Here’s why the DIY approach often causes more problems than solutions. 

• Messy spreadsheets: Your data is usually scattered across utility bills and siloed systems for dozens of different sites.

• Technical jargon: Insurers use complex models that need a climate science background just to read the first page.

• Zero spare time: You’re busy with HVAC repairs and tenant calls. You don’t have forty hours to spare for building a risk narrative from scratch.

• The value gap: Most generalist advisors don’t get yields or EBITDA. They’ll give you a report that a scientist loves but your board won’t even look at.

Plus, a rough guess won’t survive a formal audit. You need a partner who provides dedicated property solutions to ensure your ESG spend actually defends your market price.

Why partner with Acumentis ESG?

Acumentis has been a trusted name in the property sector since 1905. For many commercial clients, we’ve spent years providing specialist insurance valuation services to ensure their portfolios have enough coverage to avoid being underinsured. 

Now, we’re incorporating ESG and climate risk data into a more holistic service offering. We help you move past messy spreadsheets and guesswork to build a case that insurers actually want to cover.

We turn scattered utility bills and technical reports into a defensible risk narrative for every asset class you own. Also, we make sure your data aligns with the latest climate reporting  standards. This gives you the evidence you need to challenge high premiums and protect your profit. 

Reach out to us for a scoping call to see how we can harden your portfolio for the next renewal.