How To Evaluate Offshore Wind Projects for Your Portfolio: The 5 Steps
A practical guide to assess projects like Jackdaw, understand costs, climate impact, and investment returns in 2026.
With the £1.2 billion Jackdaw project sparking debate, investors are keen to know if offshore wind is still a smart bet. Construction costs are rising and climate targets are tightening, making careful evaluation essential. This guide walks you through five concrete steps to analyze costs, benefits, and risks so you can make informed investment decisions today.
Step 1: Gather Project Data
Start by pulling the latest project filings from the UK Offshore Wind Directory and the Department for Energy Security and Net Zero. Use Bloomberg NEF’s Offshore Wind Tracker to compare CAPEX, turbine count, and expected capacity. Capture key metrics like 500 MW output and the £1.2 billion total investment in a simple Excel sheet for quick reference. The data foundation will dictate the accuracy of all subsequent analysis.
Step 2: Analyze Cost Drivers
Break down CAPEX into turbine, foundation, cabling, and onshore substation costs using the WindEurope Cost Calculator. Add OPEX figures (maintenance, insurance, decommissioning) from the latest industry reports. Run a sensitivity test by varying the cost of steel by ±10% to see impact on NPV. The cost drivers reveal where budget overruns are most likely.
Step 3: Assess Climate Impact & Policy Support
Check the UK Net Zero commitments and the Contracts for Difference (CfD) band for the region. Use the UK Green Deal database to see if the project qualifies for any tax credits. Compare the estimated CO₂ reduction (≈1 Mt per year for 500 MW) to the national 2050 targets. The policy landscape can add up to 15% of the total return through subsidies and tax incentives.
Step 4: Run Financial Modelling
Build an NPV and IRR model in Excel or use the Offshore Wind Investment Calculator on the WindEurope website. Input the CAPEX, OPEX, revenue from CfDs, and a discount rate of 7% to reflect current market yields. Include a 5‑year construction period and a 25‑year operation horizon. The financial model tells you whether the project meets your hurdle rate of 10% IRR.
Step 5: Make Decision & Monitor
If the NPV is positive, draft a due‑diligence checklist covering supply chain, regulatory approvals, and community engagement. Set up a dashboard in Power BI or use Bloomberg Terminal to track key KPIs such as capacity factor and OPEX per MW. Re‑evaluate annually or after any major policy change. The monitoring plan ensures you stay ahead of risk and capture upside early.
Most overlook supply‑chain risk; include a contingency of 5‑10% of CAPEX for turbine component delays and shipping disruptions.
You now have a clear, data‑driven framework to evaluate offshore wind projects like Jackdaw. By following these five steps, you can confidently decide whether to invest or pass. Your next move? Start gathering project data and set up your financial model today.
