Revision and practice on calculating and interpreting Return on Marketing Spend.
Key vocabulary: Return on Marketing Spend (ROMS), Marketing Campaign
Return on Marketing Spend (ROMS) is a measure that answers a simple but crucial question: "for every pound spent on marketing, how much are we getting back in sales?"
Calculating ROMS helps a business justify its marketing budget, compare the performance of different marketing campaigns, and make data-driven decisions about where to invest money in future.
ROMS (%) = ((Revenue from Campaign − Cost of Campaign) ÷ Cost of Campaign) × 100
Worked example: a business spends £20,000 on a marketing campaign, which generates £100,000 in sales revenue.
(£100,000 − £20,000) ÷ £20,000 = £80,000 ÷ £20,000 = 4
4 × 100 = 400% ROMS
A 400% ROMS means that for every £1 spent on the campaign, the business generated £4 in net profit. Many businesses aim for a ROMS of 500% (a 5:1 return) or more, though this varies hugely by industry — the key is to compare a campaign's ROMS to other campaigns or past performance, not to a fixed target.
| Benefits | Limitations |
|---|---|
| BenefitsAccountability — shows clearly whether spending paid off | LimitationsAttribution problem — hard to prove a sale definitely came from one specific campaign |
| BenefitsGuides budget allocation between campaigns | LimitationsTime lag — some campaigns (e.g. brand-building) generate sales long after they run |
| BenefitsImproves decision-making with real data | LimitationsIgnores non-financial objectives, like brand awareness or reputation |
| BenefitsKeeps focus on profitability | LimitationsCan encourage a short-term focus over long-term brand building |
A common real-world split in marketing budgets is between "direct response" activity — like pay-per-click (PPC) search ads, where every click and resulting sale can be tracked precisely — and "brand building" activity like TV advertising or event sponsorship, where the link to any individual sale is much harder to prove. UK Google Ads PPC costs in 2026 typically range from around £1.50 to £2.50 per click for most small and mid-sized businesses (rising much higher in competitive sectors like legal services), and because every click is trackable, a PPC campaign's ROMS can usually be calculated with real precision. A TV or sponsorship campaign's contribution to sales, by contrast, has to be estimated rather than measured directly — this is exactly the "attribution problem" limitation of ROMS in action.
Source: verified via search, September 2026 — Whitehat SEO and Search Lucid's 2026 UK Google Ads cost benchmarks.
Gymshark, the UK fitness apparel brand, reported revenue of £646 million for the year to July 2025, its thirteenth consecutive year of growth. Reporting on the brand's 2026 strategy describes Gymshark increasingly treating marketing spend as a "capital allocation decision" — asking what it can invest in (such as its own physical stores and community events) that will keep marketing the brand permanently, rather than a one-off campaign cost that stops paying back once the ads stop running. This reflects one of ROMS's real limitations: a single campaign's short-term ROMS doesn't capture the longer-term value of brand-building investment.
Source: verified via search, September 2026 — Gymshark's FY2025 results reporting and 2026 marketing strategy coverage.
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1. A campaign costs £10,000 and generates £50,000 in revenue. What is the ROMS?
2. A campaign costs £25,000 and generates £75,000 in revenue. What is the ROMS?
3. What does a ROMS of 100% mean?
4. Which type of campaign is usually hardest to calculate an accurate ROMS for?
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Return on Marketing Spend.
((Revenue from Campaign − Cost of Campaign) ÷ Cost of Campaign) × 100.
Any one of: the attribution problem, time lag, ignores non-financial objectives, encourages short-term focus.
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Connecting to investment appraisal (finance): ROMS is essentially a marketing-specific version of return on investment (ROI) — the same underlying logic (comparing a return to the cost that generated it) appears across the specification, from payback period to average rate of return. Drawing this comparison explicitly is a good way to show synoptic understanding in an exam answer.
A strong evaluative answer on ROMS doesn't just calculate the number — it weighs up whether ROMS is the right measure of success for that particular campaign. A campaign designed purely to build long-term brand awareness (not drive immediate sales) may show a low or even negative ROMS in the short term while still being a good use of the marketing budget.
Before using this: AI tools can get facts or mark scheme details wrong, and quality varies by tool. Always check anything factual against your notes or ask your teacher.
Give me three short ROMS calculation problems, similar in style to an AQA A-Level Business exam, with the answer hidden until I ask for it. After each attempt, mark my working and tell me whether I've shown the correct formula, not just the final number.