ToolSahla, Tools Sahla

I expect 20,000 in sales from a Ramadan campaign at a 30% margin: what is the most I can spend on ads without losing money?

Multiply expected sales by your margin before ads: 20,000 × 30% = 6,000. That is the ceiling, where gross profit covers the ads exactly and nothing is left for you. The budget you actually plan should sit well below it, because the sales figure itself is a forecast that may not come true.

Published · 3 min read

Why revenue × margin is the ceiling

At a 30% margin, every 100 of sales leaves you 30 before ads. Sell 20,000 and your gross profit is 6,000, and any ad spend is paid out of that. Spend 6,000 and profit is zero; spend more and you pay the difference yourself.

Try several budgets before you start

The calculator is normally used after a campaign ends, but it works just as well beforehand if you enter the sales you expect. Open the ROAS calculator, enter 20,000 as revenue and 30 as the margin, then vary the spend:

  • Spend 4,000: ROAS 5x, ad share 20%, verdict above break-even, estimated profit after ads 2,000.
  • Spend 6,000: ROAS 3.33x, equal to break-even, and the calculator says the ads pay for themselves exactly with no profit.
  • Spend 8,000: ROAS 2.5x, verdict below break-even, estimated loss 2,000.

Notice the 3.33x break-even stays the same in all three, because it depends on the margin alone. What changes is your expected ROAS, since you are dividing the same sales by different budgets.

What if sales come in below forecast?

This is the real risk in planning. The 20,000 is your estimate, and the calculator has no way of knowing whether it is realistic. Rerun it with a more cautious forecast, say 15,000:

  1. With 6,000 spent: ROAS 2.5x, below break-even, estimated loss 1,500.
  2. With 4,000 spent: ROAS 3.75x, above break-even, estimated profit 500.

A budget that looks safe when the forecast holds can turn into a loss when sales fall short by just a quarter, while the 4,000 budget absorbs that shortfall and stays profitable. The distance between the ceiling and what you actually spend is your safety margin.

Tips for planning a seasonal budget

  • Base the sales forecast on real figures from a previous season if you have them, not on a wish.
  • If you will run Ramadan offers or discounts, your margin shrinks, so recalculate it in the Profit margin calculator at the offer price before setting the budget.
  • Release the budget in stages, and after the first week enter actual sales and actual spend to see where you stand.
  • Profit after ads does not include your fixed costs. To see what sales cover them, use the Break-even calculator.

Common questions

Does the calculator work out the maximum budget directly?

There is no field for it. But the ceiling is revenue × margin, and entering it as spend confirms it: the result reads 'equals break-even'.

Does break-even change with the budget?

No. It is 1 ÷ margin, so 3.33x at a 30% margin, whatever the budget.

Is my forecast saved?

No. The calculation runs in your browser and nothing is sent.