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 to 5% of gross revenue to hold position and 5 to 10% to grow. For a $1M firm, that’s roughly $20k to $50k a year to maintain, and $50k to $100k a year to grow. Treat those as orientation, not gospel. Firms living entirely off referrals often spend close to zero, which works until it doesn’t (we’ve written about getting leads without relying on referrals and why that ceiling appears).

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. Most firm owners have never done this sum, and it changes how the budget conversation feels.

Divide your growth target by that acquisition cost. Ten new clients a year at your acquisition cost is your working annual budget.

The firms that get stuck are the ones that skip this 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	Hidden cost
Google Ads	Clicks from people already searching for an accountant	Modest. Leads convert with basic sales skill
Facebook Ads	Reach and lead volume	High. Follow-up time and sales effort per signed client, typically the highest total cost per conversion
LinkedIn	Reaching decision-makers and referral partners	High. Months of business development per client
SEO	Content and authority that compounds	Time. Results build over months, then keep paying

That right-hand column is the part budget planning usually misses. A Facebook lead that costs less than a Google lead on paper often costs more once you count the ad spend, the follow-up time and the sales effort needed to sign them. We’ve broken down the full comparison in what’s the best marketing channel for accounting firms.

Where should the first dollars go?

For most firms, Google Ads. The people clicking are already searching for an accountant, so the leads convert with modest sales skill, and 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.

SEO is the second allocation for firms thinking past this quarter. It’s slower to start but it compounds, and unlike ads it doesn’t stop when the spend stops.

Facebook and LinkedIn earn budget later, once your firm can convert interruption-sourced leads. Both need a strong offer and genuine business development skill, and in our experience most firms need coaching on that side before those channels pay for themselves.

What’s the minimum budget that actually works?

For Google and Facebook ads, our minimum is $1,500 per month in ad spend. That’s not an arbitrary line. Below it, a campaign doesn’t generate enough volume to reach statistical significance, and the ad 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, and you end up making decisions off noise.

Worth knowing before you split that budget: at the same spend, Google and Facebook don’t cost the same per client. Facebook’s cost to actually convert a client runs higher, because Facebook leads need ongoing sales and business development to sign, whereas Google leads are actively looking for accounting services when they click. Same $1,500, different amount of work between the click and the signed engagement.

What’s the most common budgeting mistake?

Spreading a small budget across every channel at once. A firm with a modest monthly budget running Google, Facebook, LinkedIn and SEO simultaneously is funding four underpowered campaigns instead of one that works. Pick the channel that matches your sales capability, fund it properly, and add the next channel only after the first one is converting.

The second most common mistake is 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?

$1,500 per month in ad spend, in our experience. Under that, there isn’t enough volume for statistical significance or for the platform’s algorithm to learn and improve, so the campaign never gets the chance to work.

Is 5% of revenue enough for an accounting firm’s marketing?

For steady growth, usually yes. For aggressive growth or a young firm without a referral base, budgets commonly run 5 to 10% of revenue. The honest answer depends on your client lifetime value and how quickly you want to grow.

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 Google Ads plus a well-maintained Google Business Profile, 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.