Set your marketing budget by working backward from a sales goal: how many deals you want, how many leads it takes to get them, and what one lead costs. Then compare the result with what your company can carry for three months without touching salaries and suppliers. A percentage of revenue works as a quick check, but it is not enough alone for a small company.
You will find four methods and when each fits, a hypothetical backward calculation, what the budget must include so that forgotten items do not surprise you, and a monthly rule for raising or cutting spend.
Four ways to set a marketing budget and when each one fits
| Method | How it works | Fits when | Its weakness |
|---|---|---|---|
| Backward from the goal | Deals to leads to cost | You have a clear goal and a rough close rate | Needs figures that may be estimates at first |
| Percentage of revenue | A fixed share of sales | Sales are stable and you want a simple ceiling | Ties spend to the past, and shrinks when you need growth |
| From profit per deal | A set part of the profit on each expected deal | Margins are clear and cash is limited | May be too small to start a new channel |
| What you can afford | What is left after fixed commitments | An early stage with tight cash | Unrelated to what the goal requires |
Combining two usually works best. The backward method tells you what you need, and what you can afford tells you what is possible. If the first is far larger, change the goal or the time frame, and do not start below the level that gives you a readable result.
Is there a right percentage of revenue?
No single percentage suits every company. In Gartner's 2026 CMO Spend Survey, marketing budgets averaged 7.8% of company revenue, but the sample was 401 marketing leaders in North America, the UK and Europe. That sample does not represent a small company in Egypt or Saudi Arabia.
Many articles say the US Small Business Administration recommends 7% to 8%. We did not find that figure in the official SBA marketing guide we reviewed, and the articles repeating it disagree, so do not base your decision on it. Use a percentage to ask if your spend is far from reasonable, then calculate with your own numbers.
Some differences make your right share higher or lower, as practical reasoning and not a measured standard. A new company winning its first customers needs a higher share than an older one living on referrals, and a high-margin product can carry more spend than a thin-margin one.
A hypothetical backward calculation from a sales goal
These figures are entirely hypothetical. Replace them with your own, and if you do not know one, use a cautious estimate and label it as an estimate.
| Step | Calculation | Result |
|---|---|---|
| Monthly goal | From the sales plan | 20 deals |
| Close rate on qualified leads | From sales records | 25% |
| Qualified leads needed | 20 ÷ 25% | 80 qualified leads |
| Share of leads that qualify | From reviewing the last 100 leads | 50% |
| Total leads | 80 ÷ 50% | 160 leads |
| Cost per lead | From a past campaign or small test | 100 |
| Monthly ad spend | 160 × 100 | 16,000 |
Now check that against profit per deal. If profit per deal in this example is 2,000, then 20 deals bring 40,000. Ads alone take 40% of that, at 800 per deal. Is enough left after the other budget items? To work out profit and cost per deal accurately, use the table in how to calculate customer acquisition cost.
This also shows where you gain most. Raise the close rate to 33% and required leads fall to about 120, saving roughly 4,000 a month in this example with no improvement in the ads. That is why follow-up and lead qualification belong in the budget conversation.
What a marketing budget must include
Ad spend is one item among several. Many people forget the rest, then ads eat all the money. Write these down before setting a final figure:
| Item | Examples | Note |
|---|---|---|
| Ads | Google, Meta, TikTok | Check platform taxes, fees and currency differences on the actual invoice |
| Content and design | Photography, video, writing | Ads need fresh material regularly |
| Team or supplier | Salaries or a management contract | Count marketing's share of your staff's time |
| Tools | CRM, email, analytics | Subscriptions that repeat monthly |
| Site and pages | Landing page edits, hosting | See what determines website cost |
| Tests | A new message or channel | An amount you can lose without much harm |
| Reserve | A season or sudden opportunity | Spend it only by decision |
Once the ad figure is set, you still need to split it across platforms with a minimum for each, which we cover in how to split your first ad budget. To understand who runs that money and how they should report, see what media buying is.
A monthly rule for raising or cutting the budget
Review the budget once a month, after deal data is complete, and not after each bad day. Judge a channel by cost per deal compared with profit:
| Reading | Decision |
|---|---|
| Cost per deal is clearly below profit, and the team can serve more leads | Raise the budget in steps and watch cost after each one |
| Cost per deal is close to profit | Do not raise it. Fix the message, page or follow-up |
| Cost per deal exceeds profit for two months, with no seasonal reason | Cut or stop, and move the money to what is profitable |
| You do not know cost per deal | Do not raise it. Fix measurement first |
With a long sales cycle, deals may not show up in the same month. In that case, judge for now by cost per qualified lead, then look back once your usual sales cycle has passed. All of this depends on sound conversion tracking.
Mistakes that waste a marketing budget
- A new channel every month. None gets enough time to give a readable result, so keep to the order in where to start with digital marketing.
- Spending everything on ads. Leads reach a weak page, or nobody answers them.
- Stopping everything after one weak month. You lose what the campaign learned and start over.
- Budgeting by calendar. A peak month needs more than a quiet one, so spread spend across your seasons.
- Relying on the platform's report alone. Compare it with what your sales team actually recorded.
Your next step
Open your last three months of sales records, pull your close rate and share of qualified leads, and fill in the backward calculation. Compare the result with what your company can carry for three months, and put it in the marketing plan template. If you want to review the numbers with a team that runs spend with a clear monthly report, take a look at PlanKit's media buying service.