The Marketing Budget as a Percentage, Not a Fixed Number

Why this matters

Ask ten shop owners what their marketing budget is and most will name a flat amount they picked once, years ago, and never revisited. That number stops making sense the moment revenue moves. A budget set as a flat amount either starves a growing shop of the leads it needs to keep growing, or keeps a slowing shop bleeding money into channels it can no longer justify. Setting the budget as a percentage of revenue instead of a fixed figure is the single change that keeps marketing spend proportional to what the business can actually support, in good months and bad.

Why percentage beats a flat number

A flat marketing budget was set against a specific revenue level at a specific moment. Revenue moves every month; the flat number doesn't. Set it too high for a slow month and you overspend relative to what's coming in. Set it too low for a fast-growing month and you underspend exactly when a strong channel deserves more fuel. A percentage-of-revenue budget rises and falls automatically with the business, which is the behavior you actually want: spend more when there's more to spend, pull back when there's less.

The other advantage is comparability. "We spend a flat amount on marketing" tells you nothing about whether that's reasonable. "We spend a fifth of revenue" is a number you can hold up against a benchmark, a competitor, or last year's version of your own business, and actually learn something from the comparison.

A general range to anchor on

Marketing spend as a share of revenue varies by how established the shop is and how aggressively it's trying to grow, but a useful anchor:

• A newer shop building a customer base from close to zero typically needs to spend a noticeably larger share of revenue on marketing, because there is no existing customer relationship or reputation doing any of the work yet. Every lead has to be bought or earned from scratch.
• An established shop with a steady base of repeat and referral business can typically run on a meaningfully smaller share, because word of mouth, past-customer follow-up, and reputation are quietly doing part of the job that paid channels would otherwise have to do alone.
• A shop in an aggressive growth push, adding trucks or opening a new service area, temporarily runs closer to the newer-shop end of the range even if it's been established for years, because it's effectively re-acquiring a customer base at a faster pace than its existing reputation can support on its own.

Treat these as a starting range to test against your own numbers, not a rule to apply blindly. The right share for your shop depends on your margins, your local competition, and how much of your growth is coming from channels that cost nothing to run, like referrals and repeat business.

Turning the percentage into a real budget

1. Start from trailing revenue, not projected revenue. Use the last twelve months, or the last full season if your trade is seasonal, so the base number reflects what actually happened rather than a hopeful forecast.
2. Apply the percentage to get a total. This is your marketing envelope for the coming period, reviewed and reset on a regular cadence rather than set once and forgotten.
3. Split the total across channels by what's actually working, not by habit. A channel that converts well earns a bigger slice next period; a channel that's gone flat gets trimmed, regardless of how long you've been running it.
4. Reset the percentage itself periodically, not just the dollar total. Revenue changes update the total automatically, but the percentage itself should get a fresh look at least once a year against how the business is actually performing.

The trap of chasing a fixed target instead

Some owners flip this around and try to hit a fixed lead count or fixed spend target regardless of what revenue is doing that month. That's backward. If revenue drops for a real reason (a slow season, a capacity constraint, a local downturn) and you keep spending against last year's healthier number, you are now spending a much larger effective percentage than you planned, at exactly the moment cash is tightest. Let the percentage lead, and let the dollar total follow it down as well as up.

Signals it's time to adjust the percentage, not just the total

• Every lead-producing channel is converting well and capacity has room to grow. That's a signal to raise the percentage temporarily, not just to keep spending flat while revenue climbs.
• A channel that used to convert well has gone flat for several consecutive review periods. That's a signal to lower spend into that specific channel, independent of what's happening to the overall percentage.
• The shop is at or near capacity and the backlog is weeks out. More leads don't help if there's nobody to do the work; this is a signal to shift the percentage toward retention and referral spend, which produces higher-margin repeat work, rather than toward pure lead volume.
• A new competitor enters the market or an existing one visibly increases their own spend. This doesn't automatically justify raising your percentage, but it's a prompt to check whether your current spend is still enough to hold your position, not just grow from it.

References

• U.S. Small Business Administration (SBA), marketing budget planning guidance for small businesses
• See related: Referral Partner Marketing vs Paid Channel Marketing
• See related: Cut Marketing Spend in a Downturn Decision Tree
• See related: What a Good Lead-Gen Report Actually Tells You