In-House Marketer or Agency? The Decision Framework for a Growing Accounting Firm

23 September 2026·5 min read

Quick answer: There's no universal right answer — it comes down to your budget reality, how many different skills you need covered at once, how spiky your workload is around EOFY and BAS deadlines, and how much oversight you can realistically give a specialist. Firms with steady, broad marketing needs and someone to manage a hire tend to do better in-house; firms with seasonal spikes and narrow needs usually get more value from an agency. Plenty of growing firms end up with both. 📈

There's a point almost every growing accounting firm hits where founder-led marketing — or no real marketing at all — stops keeping up, and the instinct is usually "we need an agency" or "we need to hire someone," decided in about ten minutes based on a gut feeling. 💖 It's a bigger decision than that, and getting it wrong is expensive either way: a hire who's underused for eight months of the year, or an agency retainer that never quite understands your service lines. Here's an actual framework instead.

What most growing firms get wrong about this decision

They treat it as permanent and binary, when it's neither. Many firms need one model at 15 staff and a different one at 40. They also tend to compare a full agency retainer against a junior marketing salary without accounting for what each actually covers — a $70k in-house hire rarely covers design, paid ads, SEO, email and social all done well; a $70k agency retainer might, or might not, depending on scope. And almost nobody budgets for how seasonal an accounting firm's marketing workload actually is, with everything piling up around EOFY and BAS deadlines and going quiet the rest of the year.

The in-house vs agency decision scorecard

Score each factor 1 (strongly favours agency) to 5 (strongly favours in-house), then add them up.

Budget: Can you commit to a full loaded salary — including super, leave and tools — year-round, even in quiet months?
Skill breadth: Do you need one thing done well (say, just SEO), or five different skills covered at once (design, copy, paid ads, email, social)?
Workload shape: Is your marketing need fairly steady across the year, or does it spike hard around EOFY/BAS and go quiet the rest of the time?
Oversight: Does someone on your team have enough marketing knowledge to brief and manage a specialist, or do you need someone who can self-direct?
Time to value: Do you need results within 4–6 weeks, or can you invest 3–6 months building internal capability?

Scoring guide: Mostly 1–2 → an agency or fractional support fits better. Mostly 4–5 → in-house makes more sense. Mixed scores → a hybrid model (in-house coordinator plus agency for specialist skills) is common, and often the most cost-effective option of the three.

A 10-partner firm growing fast: Hired a junior marketing coordinator who was great at social and client comms but had no depth in SEO or paid ads. Rather than hire a second full-timer, they layered a specialist agency on top for just those two channels — a genuine hybrid, and cheaper than a second salary.

A boutique 4-person practice: Tried a full-time marketing hire first. The workload was mad at EOFY and near-silent from August to December, so the hire was underutilised most of the year. They switched to an agency retainer that could flex up and down with the season instead.

A 25-person multi-office firm: Complex service lines and client segmentation meant an outside agency kept needing re-briefing on technical detail. They went in-house specifically so that institutional knowledge stayed inside the building.

How to actually make the call

Run the scorecard independently with two or three decision-makers, then compare notes — the gaps are often where the real conversation needs to happen. Cost out the full loaded cost of a hire against an agency retainer on an apples-to-apples basis, not headline salary versus headline retainer. If you're genuinely unsure, pilot a 3-month agency engagement before committing to a hire — it's far easier to unwind than a job offer. And revisit the decision annually, because a firm's marketing needs change shape as it grows.

💡 This isn't an anti-agency or pro-agency piece. We run an agency, and we still tell prospective clients when in-house makes more sense for their stage — because the firms who are happy with an agency model at 15 staff often genuinely outgrow it by 40, and the reverse happens too, where an in-house hire starts to feel like overkill after a downsizing or restructure.

Mistakes to avoid

Hiring in-house purely because an agency retainer "feels" expensive, without comparing total cost properly
Choosing an agency to avoid the hassle of hiring, without checking they actually understand accounting and its regulatory context
Never revisiting the decision as the firm grows or restructures
Not budgeting for ramp-up time — neither option produces real results in the first few weeks
Expecting one hire or one channel specialist to cover five different marketing skills equally well

Frequently asked questions

Is an agency always more expensive than hiring in-house?

Not necessarily. A junior in-house salary looks cheaper on paper, but once you add super, leave, software subscriptions and ramp-up time, the gap narrows a lot — especially for a firm that only really needs marketing support part of the year.

What size firm typically needs an in-house marketer?

There's no hard number, but many firms find the switch makes sense somewhere around 20–30+ staff, once marketing needs become steady enough — not just EOFY-driven — to justify a dedicated full-time role.

Can we run a hybrid model?

Yes, and it's increasingly common — an in-house coordinator handling day-to-day content and client comms, with an agency brought in for specialist skills like paid ads or SEO.

How long should we trial an agency before deciding to hire in-house instead?

Give any new arrangement at least a full quarter, ideally through one of your seasonal peaks, before judging it. Marketing results — and workload patterns — rarely show clearly in the first few weeks either way.

Keep reading 🤍

Written by

Kate, founder of Chronically Online

I help Gold Coast and Brisbane businesses grow with branding, websites and marketing that actually works.

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