Most partners already know how to write a marketing plan for an accounting firm in the abstract sense. Define the audience, pick some channels, set a budget, measure results. The plan itself is rarely the problem. What fails is the gap between the document and January, when three tax return deadlines land at once and marketing quietly stops for six weeks.

The plans that survive share a shape. They are short enough to read in two minutes. They assume the firm will lose weeks to compliance season and build that into the schedule. They commit to fewer channels than the partner group would like, because two channels executed weekly beat five channels executed occasionally.

This guide sets out that format. It covers how to size the plan against your actual delivery capacity, how to define the client you want more of, how to choose channels by follow-through rather than by what looks current, how to set targets you can measure inside your existing systems, and how to run a quarterly review that adjusts the plan without rewriting it. The worked example throughout is a five person practice, because that is where the constraint bites hardest.

The first number in the plan is not a revenue target. It is the number of new clients your firm can take on over the next twelve months and still deliver properly. Work it out from the bottom up.

The capacity calculation

Take the chargeable hours available across your delivery team for the year. Subtract the hours committed to existing clients, including the work you know will grow. Subtract a realistic allowance for compliance peaks where nobody has spare capacity. What is left divided by the average hours a new client of your target type consumes gives you a client number.

A five person practice with two qualified staff and a manager might find it has room for eighteen to twenty-four new clients across the year, concentrated outside January and the summer filing window. That number changes the plan completely. Twenty clients a year is roughly two a month, which at a typical conversion rate of one in three or one in four qualified enquiries means six to eight real enquiries a month. That is a modest, achievable target. It does not require five channels.

Why this matters operationally

Firms that skip this step build marketing plans aimed at volume, then either turn away good enquiries because nobody has time to respond, or take everything on and degrade service quality for existing clients. Both outcomes cost more than they earn. Sizing the plan against capacity also tells you when to invest in onboarding automation instead of more lead generation, which is usually the cheaper move.

The audience section of the plan should describe a client type specifically enough that a stranger could recognise one. Broad definitions such as owner-managed businesses in the region produce broad marketing, and broad marketing produces enquiries that stretch your team and negotiate on fee.

Use your own portfolio as the data source

Run three filters across your existing client list. Which sector or client type produces the best realisation rate against the hours you put in. Which engagements pull through additional advisory work rather than sitting flat at compliance. Where does your team already have real depth, meaning you answer the questions without research.

The overlap of those three is your target. It might be construction subcontractors, veterinary practices, ecommerce sellers dealing with multi-jurisdiction VAT, or property landlords with more than three units. The label matters less than the fact that it is narrow enough to write specific content about.

Write the definition down properly

A usable audience line in the plan includes the sector, the size band, the trigger event that makes them look for a new accountant, and the thing they are worried about. For example: ecommerce sellers turning over enough to have crossed a VAT threshold in a second country, looking for help after their current accountant gave a vague answer about overseas registration.

That level of specificity does real work later. It tells you which pages to build, what to write about, which search terms matter, and how to word an ad. A vague audience definition forces every downstream decision to be made on instinct.

This is where most plans overcommit. The honest question is not which channel performs best in general. It is which channels your firm will still be executing in month seven, after the novelty has worn off and the January workload has been and gone.

Score each channel before you commit

For each candidate channel, write down three things: the hours per week it needs, the person who will do those hours, and how long before it produces a measurable result. Then check the plan against your compliance calendar. If the person named is also the person who signs off tax returns, the channel will stall in January whatever the plan says.

• Search visibility and website content. Slow to start, compounding once established. Needs consistent output, works well when the writing can be scheduled ahead of peak season.
• Google Ads. Enters the auction quickly and produces enquiries in weeks rather than months. Needs someone watching search terms and negative keywords weekly, plus a genuine budget commitment.
• LinkedIn. Depends almost entirely on one person posting and having conversations. Fine if a partner enjoys it, dead within a month if it is delegated to someone who does not.
• Structured referrals. Low time cost, high trust, limited ceiling. Worth systemising even when it is not your growth engine.
• Outbound email. Predictable volume, requires list building, sequencing, and attention to the data protection rules covered below.

Pick two, maybe three

For a firm of 2 to 20 staff, two channels executed consistently plus referrals kept warm is a full plan. Add a third only when the first two run without partner attention. Firms that list six channels usually run one badly.

A marketing plan that measures impressions and follower counts will tell you nothing useful at the quarterly review. Measure the things that connect to fee income.

The four numbers worth tracking

1. Qualified enquiries per month. Count only enquiries that match your defined client type. An enquiry from a sole trader wanting a one-off return does not count towards a plan aimed at ecommerce sellers.
2. Enquiry to meeting rate. If enquiries arrive but meetings do not get booked, the problem is response speed or qualification, not lead volume.
3. Meeting to client conversion. This exposes pricing and positioning problems faster than anything else.
4. Average annual fee of new clients. Rising enquiry volume with falling average fee means the marketing is attracting the wrong end of the market.

Instrument it before you launch

Decide where each number lives before the first campaign runs. Enquiries should land in one system with the source recorded, whether that is a CRM or a spreadsheet the practice manager updates weekly. If you cannot answer where did this client come from six months later, you cannot make a sensible decision about where to spend next year.

Set the review threshold in advance

Write down what would make you stop a channel. For example: if paid search has not produced a qualified enquiry within eight weeks of launch at the agreed budget, it gets paused and reviewed. Deciding this while calm prevents the two common failure modes, which are killing a channel three weeks in and keeping one alive for two years out of sunk cost.

Accounting firms carry a professional standard that most businesses do not, and the enforcement risk on marketing communications is real. The Information Commissioner's Office sets out the position clearly, and the rules differ by channel and recipient type.

Email and text

The Privacy and Electronic Communications Regulations govern electronic marketing. Sending marketing email to generic business addresses at limited companies and limited liability partnerships does not require consent under PECR. Where you are using personal data such as a named contact, a sole trader, or certain partnerships, data protection law applies and you generally need consent unless the soft opt-in applies. The soft opt-in covers people who bought from you or expressed interest in similar services, provided they were given a clear chance to opt out when you collected the data and in every message since.

Post and phone

Direct mail does not require consent, though naming an individual on a mailing means you need a lawful basis for using their data, and you must stop when asked. Telephone marketing has its own screening obligations.

Practical points for the plan

• Every marketing email must identify who you are and carry a working opt-out.
• Record where each contact came from and what basis you are relying on.
• Process opt-outs promptly and make sure suppression carries across every system you send from.

Full guidance is on the ICO website. Build the compliance steps into the plan as a named responsibility rather than an assumption.

The format matters more than most partners expect. A twenty page marketing document is a project that ends when it is finished. A one page plan is an operating tool that gets referred to in Monday meetings.

What belongs on the page

• Capacity number for the year, and the monthly qualified enquiry target that follows from it.
• Target client definition in one or two sentences.
• Two or three channels, each with a named owner and a weekly or monthly commitment.
• The four numbers you are tracking, and where they live.
• Budget by channel, expressed as a monthly commitment.
• Review dates for the next four quarters.
• The stop condition for each channel.

What does not belong

Brand values, competitor SWOT grids, mission statements, and channel research summaries can live in a separate appendix if anyone wants them. They do not change what happens next Tuesday, so they do not belong on the operating page.

Circulate it internally

Every member of the team should have seen the page, particularly the target client definition. Delivery staff talk to clients daily and will spot the right referral opportunities once they know what to listen for. A plan held only by the managing partner produces marketing that only the managing partner supports.

Working through these six steps in order produces a finished one page plan in a couple of focused sessions. Do them in sequence, because each step constrains the next.

Four patterns account for most failed marketing plans in firms of this size.