ROAS vs DRR: what's the difference and which to use

ROAS vs DRR: the actual difference

Both metrics compare ad spend with revenue. Only the direction of the division changes. ROAS answers the question, how much revenue did each soum of ad spend bring back. DRR (the Russian abbreviation for ad cost share) answers, what share of revenue went to advertising.

ROAS = revenue / ad spend, and higher is better. DRR = ad spend / revenue, usually shown as a percentage, and lower is better. That opposite logic is where most confusion starts, especially when a team mixes Google Ads and Meta reports, which lean on ROAS, with finance reports built around cost shares.

How to convert one into the other

The link is simple: DRR = 1 / ROAS and ROAS = 1 / DRR. A ROAS of two means ads take half of revenue. A ROAS of four means a quarter. In reverse, a DRR of one fifth of revenue equals a ROAS of five.

So there is no need to argue over which metric is more correct. Pick one for routine reporting, and when marketing and finance each prefer a different one, show both side by side with the conversion noted.

Setting targets from your margin

The biggest practical advantage of DRR is that you can compare it directly with margin. If ads consume more of the revenue than is left after buying the product, every ad-driven sale loses money. For ROAS the rule is the mirror image: the break-even ROAS equals one divided by your margin share. If margin is a third of revenue, break-even ROAS is three.

A workable order of calculation:

• Work out margin for each product category or service.
• Subtract other variable costs: delivery, Click and Payme or marketplace commissions, packaging, returns.
• Decide how much profit you want to keep.
• What remains is your maximum DRR. Target ROAS is one divided by that DRR.

Example: a blended number can hide a loss

Imagine a Tashkent online store selling kitchen appliances and tableware through its website and a Telegram bot. The store-wide DRR sits inside average margin, so everything looks fine. Split it by category, though, and appliances with thin margin may already be losing money while high-margin tableware covers the gap.

The fix is not to switch ads off but to run separate campaigns with separate targets. Appliances can be promoted as bundles with tableware, while tableware can tolerate a higher DRR to capture more demand. A single target for the whole store almost always hides imbalances like this.

Limits of both metrics

ROAS and DRR are both based on revenue, not profit. They depend on attribution, meaning which orders you credit to ads. If you only count the first order, repeat purchases stay invisible. If spend includes only the ad budget and leaves out contractor fees and tools, the picture looks better than it is.

Payment lag is another trap. A customer sees an Instagram ad, thinks for a few days, then pays. This week's revenue belongs to last week's spend. For an honest figure, compare periods with that delay in mind, or calculate by month.

Common reporting mistakes

The same few errors appear again and again, and all of them are fixed with tidier bookkeeping:

• Comparing the ROAS of one channel with the DRR of another.
• Taking revenue from the ad account without checking it against real payments and the CRM.
• Not subtracting returns and cancelled orders.
• Applying one target to every category.
• Failing to revisit targets when purchase prices, the exchange rate, delivery terms or commissions change.

What to choose for regular reporting

Choose one main metric, agree how revenue is counted and which costs go into spend, and tie targets to margin. Review them at least once a quarter and after any noticeable pricing change. For strategic decisions, add profit and ROI on top of ROAS or DRR.

When ad, order and payment data live in different places, calculating this by hand gets tedious. At markdev we set up end-to-end analytics and reporting so ROAS, DRR and profit by category come from real sales. If you would like to talk through your own case, get in touch.