The B2B Marketing Budget Puzzle: How Much Should You Really Spend?

Marketing budgets often feel like a puzzle for B2B leaders. How much should you invest to see real results without wasting resources?

The answer varies depending on your company size, your sector, and your growth ambition. However, we can look to credible industry data to find the missing pieces.

According to the 2025 Gartner CMO Spend Survey, the average marketing budget has stabilised at 7.7% of annual revenue. While this provides a useful baseline, a deeper dive into the UK market reveals that 'average' rarely means 'optimal' for businesses seeking growth.

Here is a breakdown of the 2026 landscape to help you make informed decisions.

The 'Maintenance' vs 'Growth' Split

For many small to medium businesses, the 7.7% figure acts as a maintenance budget. It keeps the lights on, the content flowing, and the brand visible.

However, if your goal in 2026 is aggressive market acquisition, Forrester’s 2026 Budget Planning Guide suggests a more robust approach is needed. Their data reveals that despite economic headwinds, 83% of B2B marketing decision makers planned to increase their investment entering this year to capture market share from cautious competitors.

Sector Specific Benchmarks

Spending habits vary wildly between industries. Here is what the latest data suggests for your sector.

Technology and Software

This sector remains the biggest spender. High competition drives budgets to 8% to 12%. However, the focus has shifted. Gartner notes that CMOs in this space are now prioritising AI driven productivity over headcount, using technology to squeeze more output from static budgets.

Manufacturing and Industrial

While traditionally lower spenders (typically 2% to 6%), manufacturers are currently defying the 'digital only' trend. The IPA Bellwether Report (Q4 2025) highlights that while general ad spend is down, face to face activity is booming. Industrial firms are moving budget back into trade shows and events to secure orders in a human centric sales cycle.

Professional Services

Firms in law, consultancy, and accountancy are allocating 6% to 10%. The strategy here has pivoted towards reputation management. The IPA data shows a net increase in Public Relations (PR) budgets, as firms prioritise trust and thought leadership over broad advertising.

Where is the Money Moving in 2026?

The most revealing data from the January 2026 IPA Bellwether Report is not about the total spend, but the channel shift.

Standard 'Main Media' advertising (TV, Radio, Out of Home) is seeing significant cuts. In its place, B2B budgets are flowing into three specific areas:

• Events (+1.4% Net Balance): After years of digital fatigue, physical presence is back as a primary lead generator.

• PR (+3.5% Net Balance): In an era of AI generated noise, third party credibility is becoming a premium asset.

• 'Other Online' (+13.2% Net Balance): This category, which includes influencer partnerships, native advertising, and retail media, is seeing a massive surge. B2B brands are moving away from generic display ads to more integrated, content led formats.

The AI Factor: Efficiency over Expansion

A key theme for 2026 is the 'Dual Optimisation' challenge. Gartner highlights that 59% of CMOs feel they lack the budget to fully execute their strategy. The solution? AI.

Successful companies are not necessarily increasing their cash spend; they are investing in GenAI tools to automate content versioning and data analysis. This allows them to run 'large enterprise' style campaigns on a medium sized budget.

How to Decide Your Budget

Setting your marketing budget depends on several factors beyond size and sector:

Beyond the benchmarks, four factors should dictate your final figure this year:

• Growth Targets: If you want to grow by 20%, you cannot rely on a 'maintenance' budget of 7%.

• Sales Cycle: Longer cycles (common in manufacturing) require sustained, 'always on' visibility to keep prospects warm.

• The 'Trust' Deficit: If your sector is crowded with low quality AI content, investing in high quality Events and PR can differentiate you.

• Performance: Analyse your 2025 data. If 'Main Media' failed to deliver, follow the industry trend and reallocate that fund into direct engagement channels.

Need help solving the puzzle?

If you are looking to explore your options, Betula Marketing Hub can help. We act as your strategic partner, combining creativity, analytics, and proven strategies to drive measurable growth for ambitious B2B businesses across the UK.

👉 Get in touch to discuss your 2026 strategy today.