How to set a small business marketing budget

Most small business marketing budgets are set one of two ways: a percentage pulled out of a blog post, or whatever is left in the account at the end of a good month. Neither is a budget. One is a guess about someone else's business, and the other is a decision to have no budget at all.

A budget you can actually run is three numbers: what you can spend every month without flinching in a quiet one, how that splits across the few channels that suit you, and what each channel has to bring back to earn another month. Everything below is about arriving at those three numbers honestly.

Start with what you can lose, not with a percentage

The standard advice — spend 5% to 10% of revenue on marketing — is not wrong, it is just useless as a first step, because it assumes a revenue line steady enough to take a slice from. A two-person business with seasonal work does not have that.

Work it out from the bottom instead:

1. Take last year's revenue and subtract every fixed cost — rent, wages, stock, insurance, loan repayments, your own drawings. What is left is your annual margin.
2. Reserve a real amount for tax and for equipment replacement. Do this before marketing, not after.
3. What remains is the pool. Marketing comes out of that pool alongside everything else you want to improve.
4. Pick a monthly number you could keep paying for twelve months through your worst quarter. That is your budget. Not the number you could afford in a good month.

For most independent businesses in the UK and US, that lands somewhere between 3% and 8% of revenue. A business with healthy margins and room to grow might push to 10% for a defined stretch. A business in its first year sometimes has to spend more than it earns on marketing — but it should know that is what it is doing, and for how long.

Split it in the right order: fix, then earn, then buy

Money spent in the wrong order is the most common way small businesses waste a marketing budget. The order that works:

1. Fix what is broken (one-off, first)

Before a monthly budget, there is usually a small one-time spend: proper photos of your work and premises, a website page per service, your listing cleaned up, a decent sign on the van. This is not marketing spend in the ongoing sense — it is infrastructure. It pays back for years and it makes every pound spent afterwards work harder.

Typical range: a few hundred to a couple of thousand, once. If a channel is going to send people to a page that does not answer basic questions, fix the page first.

2. Own the free assets (time, not money)

Your map listing, your reviews, your enquiries answered fast, your existing customers asked to come back. These cost time rather than cash and they are where the best returns are for local businesses. Any budget spent before these are handled is being spent to send people to a leaky bucket.

3. Then buy attention (monthly)

Only now does a monthly number make sense. And when you do spend it, spend it where the intent already exists — people searching for what you do — before you spend it where you have to create the intent, which is far more expensive and much harder to measure.

A simple split that holds up

For a local service business spending, say, £500 a month, a defensible split looks like this:

Where it goes	Share	Why
Search ads on your money terms	50%	These are people typing what you sell, today. Highest intent, fastest read.
Keeping customers (email or text)	15%	Cheapest sale you will ever make is to someone who already bought.
Content and local pages	20%	Compounds. Slow for three months, then keeps paying without the click cost.
Referral partners and local presence	15%	Trust borrowed from people your customers already trust.

Adjust for your trade. A restaurant should weight the local pages and repeat-customer side far higher than ads. An emergency trade should weight search ads higher, because the call is urgent and the intent is already there. A business with a two-year sales cycle should weight content far higher.

The 90-day test: how to decide what gets another month

Channel decisions are where budgets die, because most owners either cut something in week three (too early to know) or keep funding something for a year because it once looked promising (too late to save the money).

Use a fixed rule instead. Every channel gets 90 days and a target, agreed before it starts:

• What did it cost? The full cost — spend, plus any fee, plus your own hours at a real rate.
• What came back? Not clicks. Enquiries, and then booked work, with an average job value you can defend.
• Was it above or below the line? If revenue from the channel is below its cost after 90 days, and the trend is not clearly improving, stop it.
• What did it teach? A channel that failed but told you which service people actually want was not wasted. Write the lesson down and re-spend on the thing it revealed.

Ninety days is long enough for search ads and email to show a real answer. It is not long enough for content or local pages, which need two to four months before the numbers mean anything — so judge those on leading indicators instead: pages indexed, rankings moving, enquiries arriving from the terms you targeted.

Keep the spend in your own account

One structural decision saves more money than any optimisation: your ad account, your card, your data. An agency or freelancer should work inside your account as a manager, not spend your budget from theirs and invoice you a lump sum.

Three reasons this matters:

• You can see every pound and pause it yourself at any time.
• The history — what worked, what keywords, what audiences — stays with you if you change supplier. That history is an asset you paid for.
• Nobody can quietly mark up your media spend. It happens, and it is invisible when the invoice is one number.

What to keep an eye on monthly

A budget review should take fifteen minutes, not a dashboard session. Note five things:

1. Spend against plan. Did you spend what you meant to? Overspend is usually a forgotten trial that never got switched off.
2. Cost per enquiry. Total spend divided by enquiries. Track it monthly — the direction of travel matters more than the absolute number.
3. Cost per booked job. The number that actually decides whether marketing is working.
4. Enquiry-to-job rate. If this drops, the problem is usually response speed or lead quality, not the budget.
5. One thing to cut. Every month, find one thing that is not earning and stop it. Reinvest, do not just save.

Five budget mistakes that cost small businesses the most

1. Setting a budget you cannot sustain. Three months at £2,000 followed by nothing is worse than twelve months at £500 — the compounding never starts.
2. Paying for reach you cannot convert. Impressions to an audience that will never drive to your door.
3. No agreed success measure. If nobody wrote down what "working" means before the spend started, the review becomes an argument about feelings.
4. Funding five channels at once on a small budget. Each gets too little to learn anything. Two or three, properly funded, beat five starved ones.
5. Forgetting your own time. If a channel needs five hours a week of your evenings, that is a real cost. Budget it or drop it.

A marketing budget is not an act of optimism. It is a small, repeatable bet you can afford to lose twelve times in a row while you learn which one pays.

If you take one action this week: write last month's actual marketing spend on a piece of paper, next to what came back from it. Most owners have never put those two numbers side by side, and the gap is usually where the next year's growth is hiding.