At a glance
Spend on Pinterest keywords or interest targeting that produced zero conversions in the 30-day window AND have had at least 7 days of serving (giving Pinterest’s 30-day attribution tail a chance to start). Sums dollars on these “dead” terms. The most common single quick-win lever for ROAS on Pinterest, but with a caveat: Pinterest’s long attribution window means a “wasted” keyword today may still earn engagement-attributed revenue in 30+ days. Be patient before pruning.
Calculation
Calculated automatically from your Pinterest Ads data. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading.Worked example
A UK home decor brand running Pinterest Shopping with broad keyword + interest targeting. Account currency: GBP. The 30-day window covers 02 Apr 26 to 01 May 26.
What’s interesting:
- £565 (4.7%) is wasted spend. That’s middle-of-the-pack for a fashion/decor brand. Under 3% is excellent; 5-10% is typical; over 10% means you have keyword/interest bloat. Annualised, this £565 is roughly £6,800 you could redirect to performing keywords.
cottagecore aesthetichas 2,100 saves and 480 clicks but zero conversions. That’s the trickiest category, lots of interest but no purchase. Three possible reasons: (a) the audience is researching / planning (cottagecore is a long-cycle aesthetic), (b) your products don’t actually match the aesthetic (your “cottage-themed” range may be too modern for the audience expecting truly rustic), (c) the landing page is wrong for the saver intent. Don’t immediately pause; let it run another 14 days so the engagement window can credit any late conversions, then if still zero, prune.wedding centerpieceshows 1,400 saves but 0 conversions because this brand sells home decor, not wedding-specific products. Pinterest’s broad-match grabbed the keyword but the audience-product fit is wrong. Pause immediately; this one won’t recover.mens room ideasis the audience-mismatch tell. Pinterest’s audience is ~60% female and decor-skewing-feminine; mens-room-themed keywords on a fashion-forward decor brand earn poor engagement (only 80 saves) and zero conversions. Pause immediately; no amount of waiting fixes audience mismatch.- The 7-day settle filter is doing real work here. Two more keywords (
scandinavian living roomandbotanical prints) earned their first conversion on day 8 and day 11; without the filter, they would have been flagged “wasted” on day 5 and prematurely paused. Patience matters on Pinterest. Other ad platforms (Google, Meta) can be pruned within 3-5 days; Pinterest needs 7-14.
- Wasted < 3% = lean keyword set, good discipline.
- Wasted 3-7% = normal; review monthly.
- Wasted 7-15% = bloat; do a quarterly prune of all zero-conversion keywords with > £50 spent.
- Wasted > 15% = either audience-mismatch problem (wrong vertical) or broken Pinterest Tag (no conversions counted, which makes everything look wasted).
- Saves high + conversions zero on a single keyword = wait 14 more days before pruning.
- Saves low + conversions zero + > 7 days old = prune immediately, audience mismatch.
Sibling cards merchants should reference together
Reconciling against the vendor’s own dashboard
Where to look in Pinterest Ads Manager: Pinterest Ads Manager > Reporting > Performance > Keyword/Interest level > group by Keyword > columns:Spend, Total checkout (or your conversion goal). Sort by Spend descending and filter to “Total checkout = 0” rows. The list of keywords is the same set this card sums, with one difference: Pinterest’s UI does not have the 7-day settle filter, so it will show MORE rows than this card (including freshly launched keywords still in their attribution-window grace period).
Why our number may legitimately differ from Pinterest’s UI:
Cross-connector reconciliation:
This is a Pinterest-only metric. There’s no direct counterpart on commerce platforms (Shopify doesn’t have a “wasted spend” concept since it doesn’t run ads). The closest cross-connector reads are peer ad platforms:
Known limitations / merchant FAQs
Should I immediately pause every keyword on the wasted-spend list? No, not on Pinterest. The 30-day click + 30-day engagement attribution window means many “wasted” keywords have saves piling up that will convert weeks later. The 7-day settle filter on this card already excludes the freshest keywords, but you should still wait 14 days from the alert before pausing if the keyword has > 100 saves. If saves are also low (< 50 in 14 days), pause immediately, that’s audience mismatch, not slow attribution. Is my Pinterest Tag broken if everything reads as wasted? Possibly. If wasted spend is over 30% of total spend, check: (1) Is the Pinterest Tag firing on your purchase confirmation page? Use the Pinterest Tag Helper Chrome extension to verify. (2) Is the Tag configured to sendpurchase_value? If only purchase events are sent, conversions count but ROAS appears as zero. (3) Has there been a recent site re-platform? A migration from Shopify > BigCommerce often breaks the Tag. (4) Is your tracking blocked by Consent Mode v2 or ad-blocker proportion above 30% of traffic? Pinterest does not yet have full Consent Mode integration, so high-ad-blocker audiences naturally read more “wasted”.
Why does Pinterest read 5% wasted while Google reads 2% wasted on the same brand?
Pinterest is a decision-time channel, so genuine waste there overlaps with “audiences not yet ready to buy”. Google’s intent-time queries either convert quickly or genuinely waste. The honest comparison is over a 90-day window, not 30; over 90 days, Pinterest waste typically converges on the Google number because the engagement tail finishes attributing.
What’s the cost of a £100 wasted-spend keyword if I leave it running?
£100 in the current 30-day window plus probably £100/month going forward, around £1,200/year per keyword. The cost compounds because Pinterest’s algorithm rebalances impressions toward keywords that are serving even when they’re zero-converting (the algorithm sees “spend = good” without conversion context). Pruning aggressively prevents the algorithm from spending more on dead terms.
My wasted spend went from 4% to 12% this week, what happened?
Most likely causes, in order: (1) Pinterest Tag broke, conversions stopped counting, all keywords appear wasted. Check Pinterest Tag Helper. (2) Audience saturation, you’ve exhausted the high-converting cohorts and are now into less-engaged ones. Check Pinterest CTR Trend for a CTR drop. (3) New campaign launch, freshly launched keywords are pre-7-day-settle but somehow appearing on the list (rare, indicates settle-filter bug). (4) Seasonal mismatch, summer fashion keywords running into autumn season; the audience moved on but the keywords didn’t.
Is wasted spend on Idea Pin (video) measured differently?
Slightly. Idea Pin uses interest targeting, not keyword. The card sums interest-level spend on interest cohorts with zero conversions in 30 days. The 7-day settle still applies. Idea Pin is more often “wasted” by definition because it’s an awareness format; expect 8-15% of Idea Pin spend to read wasted on average. Don’t pause on this card alone for Idea Pin; check engagement-per-dollar and 60-day-trailing ROAS instead.
Does this card include keywords I’ve manually paused?
No. Only status = ACTIVE keywords with > 0 spend in the window. Paused keywords stop appearing the day they’re paused. If you pause a wasted keyword today, it disappears from this card tomorrow but the dollars already spent stay in Pinterest Total Spend.
Should I rebuild keyword lists from scratch quarterly?
On Pinterest, yes more often than other platforms. Pinterest’s algorithm benefits from keyword/interest evolution; stale lists stop performing as the audience taste shifts (especially in fashion, decor, wedding). A quarterly review where you prune all zero-conversion keywords and add 5-10 new ones based on Search Terms Report findings is healthy. Annual reviews are too slow for trend-driven verticals.
Multi-account aggregation, how does waste roll up?
The card aggregates across same-currency child accounts in the same Pinterest Business Manager. Mixed-currency setups need per-account treatment. The 7-day settle filter is applied per keyword, not per account.