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How Much Should a Law Firm Spend on Marketing?

December 9, 2025

Australian law firms typically spend between 5% and 15% of gross revenue on marketing, with the average allocation weighted toward SEO (around 45%), then paid search (30%), social media (10%) and traditional channels (15%). But the right budget for your firm depends on your practice areas, your growth goals, and one figure most firms never calculate: what a retained client is actually worth. Here’s how to budget intelligently in a market with the highest advertising costs of any industry.

Why the SEO-heavy split makes sense

Legal keywords are punishingly expensive on Google Ads — often $50 to well over $100 per click in competitive areas. That economics is exactly why the typical legal budget leans on SEO: it delivers strong long-term ROI without paying per click, building an asset that keeps producing clients. Paid search still earns its place for urgent, high-intent work, but for most firms it’s the accelerator, not the engine.

Budget from client value, backwards

A retained client’s value varies enormously by practice area — a conveyancing file, a family law matter and a commercial retainer are worth very different amounts. Once you know the average value of a client in each area, your budget stops being a percentage guess and becomes a calculation: if a matter is worth $5,000 in fees and it costs you $500 in marketing to win one, that’s a strong return worth scaling. High-value practice areas can justify far more aggressive spend than low-value, high-volume ones.

The number that matters: cost per retained client

Clicks and enquiries are not the goal — retained matters are. Track cost per retained client by channel and practice area, measured against that client’s value, and you’ll always know where to invest. This matters more in legal than almost anywhere because the cost of a wasted click is so high. For the wider budgeting framework across any service business, see what a service business should spend on marketing.

Don’t scale into a leaky funnel

Because legal enquiries are so expensive to generate, wasting them is especially costly. If your website doesn’t convert, enquiries go unanswered, or your intake is slow, more advertising just pours expensive clicks into a leaky bucket. Fix conversion first — the response time, the consultation, the website — then scale spend against a known client value with confidence. To attract clients efficiently, start with how to get more clients for your law firm and the full marketing for law firms guide.

Want a budget built around your numbers?

We’ll help you work out your cost per retained client by practice area and where to invest for the best return. Start with a free audit. Call (02) 8357 4899 or book your free audit and consultation.

Hear from The Author

Rebecca Jacobs

Rebecca Jacobs is a highly skilled content writer and SEO specialist with a passion for crafting engaging and compelling content. With her expertise in search engine optimisation, she brings valuable insights and strategies to enhance online visibility and drive organic traffic. With a keen eye for detail and a deep understanding of audience needs, Rebecca delivers high-quality, tailored content that captivates readers and delivers measurable results. Her ability to conduct thorough keyword research and optimise content ensures maximum visibility and ranking potential. Rebecca stays at the forefront of the ever-evolving digital landscape, constantly honing her skills and keeping up with the latest trends and best practices in SEO. She is adept at crafting persuasive copy, optimising meta tags, and implementing on-page SEO techniques to improve website performance.