Quick answer: A common benchmark across professional services is 2–5% of revenue for firms holding steady and 5–10% for firms actively chasing growth. But the percentage matters less than the maths behind it: work backwards from what a client is worth to your firm over their lifetime, and budget enough to buy clients profitably at your actual conversion rates. If you’re after higher-value advisory clients, expect a higher cost to acquire them. If you want more predictability, focus on your local market. The right number depends on your firm and where you want to focus.
How Much Should an Accounting Firm Spend on Marketing?
Asking “how much should we spend” usually means you’re deciding whether marketing is worth doing properly. That’s the right question to sit with, because the most expensive marketing budget is one that’s too small to produce data, spread across too many channels, or pointed at leads your firm can’t convert.
We run marketing for accounting firms across Australia. Here’s how we’d think about your number.
What do accounting firms typically spend on marketing?
The professional services rule of thumb is 2–5% of gross revenue to hold position and 5–10% to grow. For a $500k firm, that’s roughly $10k–$25k a year to maintain, and around $50k (about 10%) to grow. Treat those as orientation, not gospel.
Even for larger firms with a steady flow of referrals, it still makes sense to run a marketing budget — so you can generate more referrals, leverage your referral base, and give your firm a more solid position in the market to attract clients beyond referrals. This can be done on a minimal budget, and it’s a good hedge.
The more useful question is what a client is worth to you.
How do you work out the right budget for your firm?
Work backwards from lifetime value, not forwards from what feels comfortable. The maths is short:
- Average annual fee per client. Say a business client pays your firm a few thousand dollars a year.
- Average years a client stays. Accounting clients stick for years, often a decade or more. Multiply.
- What you’d pay for one more client. If a client is worth tens of thousands over their lifetime, spending a few hundred dollars to acquire one is an obvious trade.
- Divide your growth target by that acquisition cost. Ten new clients a year at your acquisition cost is your working annual budget.
It’s a quick sum, and running it properly changes how the budget conversation feels. The firms that get stuck are the ones that skip it and pick a “test budget” instead — a budget too small to generate enough enquiries to learn from doesn’t test anything, it just spends.
What does that budget actually buy on each channel?
Different channels consume budget differently, and the true cost is never just ad spend:
| Channel | Where the money goes | Costs |
| SEO | Content and authority that compounds | The most cost-efficient channel and the best place to start. Brings in clients already searching Google for your services, and scales by layering Google Ads on top. But you need to do it right to attract the right clients |
| Google Ads | Clicks from people already searching for an accountant | Conversions can cost upwards of $500, but they’re high-intent, so you should convert them at a better rate |
| Facebook Ads | Reach and lead volume | Follow-up time and sales effort per signed client are high — typically the highest cost to acquire a client. But these can be higher-value clients: higher value, higher risk, higher return |
| Reaching decision-makers and referral partners | High — months of business development per client. Requires ongoing sales coaching and the confidence to do direct outreach |
The real cost of a lead isn’t the ad spend — it’s what it takes to sign it. A Facebook lead that looks cheaper than a Google lead on paper often costs more once you add the follow-up time and the sales effort needed to convert it.
Where should the first dollars go?
For most firms, start with SEO. It’s the most cost-efficient channel and one of the best ways to bring in clients when you’re getting going: you start capturing clicks from people already searching Google for an accountant, and because that intent is high, those leads are easier to convert. We can typically get a firm’s team trained to handle them within about a week. It’s the shortest path from budget to signed clients — provided it’s done right, so you attract the right kind of clients.
On timing, we usually see clients within 90 days, and the majority of our clients have generated leads within the first month.
Once SEO is working, scale it with Google Ads. Layering paid search on top amplifies the results you’re already getting from organic.
Facebook and LinkedIn earn budget later, once your firm can convert interruption-sourced leads. Both are interruption channels — you’re reaching people who weren’t looking for you — so they demand a strong offer and genuine sales and business-development skill, and most firms need coaching before these channels pay off.
On Facebook, we routinely see an actual cost per signed client of over $1,000 on ad spend alone. It’s high risk, high reward. Facebook may generate more leads than Google, but those leads are harder to convert precisely because they’re interruption-based: you either build more content to warm your audience up, or you need strong sales skills and constant follow-up to develop the relationship. Google is the better paid channel if you don’t yet have those sales skills.
What’s the minimum budget that actually works?
For Google ads, our minimum is about $1,000–$1,500 in ad spend per month. That’s not an arbitrary line: below it, a campaign doesn’t generate enough volume to reach statistical significance, and the platforms’ algorithms never see enough conversion data to learn and improve. A smaller budget doesn’t buy a smaller version of the same result — it buys a campaign that never finds its footing.
For Facebook its similar, a $1000-$1500 budget, but it requires strong sales skills and a lot of time to actually convert.
What’s the most common budgeting mistake?
The biggest one is not realising how high client lifetime value is for an accounting firm. Once a client is on board, they generally stay 10+ years — so factor that into your acquisition cost. Paying $500 to win a client worth $5,000 a year, who stays a decade, is an outstanding return on investment.
Two things to hold alongside that:
- Make sure you have enough working capital to fund the campaign and cover the time it takes to recover the cash.
- Higher-value advisory clients are harder to win and demand more sales skill, so weight your expectations (and your budget) accordingly.
Two other common mistakes worth avoiding:
- Measuring leads instead of signed clients. Cheap leads that never sign are the most expensive leads you can buy.
Frequently asked questions
What’s the minimum ad budget for an accounting firm on Google or Facebook? About $1,000–$1,500 per month in ad spend.
Should a small accounting firm spend on marketing at all? Yes, if growth is the goal. Small firms actually get the best return from tightly focused spend — usually SEO then Google Ads to scale — because they can dominate local searches larger firms ignore.
What’s a reasonable cost to acquire an accounting client? It varies by market and channel, but anchor it to lifetime value. A client worth tens of thousands of dollars over their time with your firm justifies an acquisition cost in the hundreds or low thousands. If your marketing acquires clients for less than a year-one fee, it’s working.
Is marketing spend tax deductible for accounting firms? You already know the answer better than we do. The budgeting question is about return, not deductibility.
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JSK Advisory builds marketing budgets and runs campaigns for accounting firms across Australia. Book a free consultation and we’ll work through your client value, your market and your growth target, and give you an honest number, including whether you should be spending less than you expected.