Half the Money I Spend on Advertising Is Wasted: Who Said It, and Is It Still True?

"Half the money I spend on advertising is wasted; the trouble is I don't know which half."

It may be the most quoted line in marketing. It shows up in board decks, agency pitches and budget reviews more than a century after it first appeared. Here's where it came from, what it means, and why it still stings.

Who said "half the money I spend on advertising is wasted"?

The line is usually credited to John Wanamaker, the Philadelphia department store founder. The record is less certain than the attribution.

• No direct source. Quote Investigator, which traces the origins of famous quotes, has never found Wanamaker writing or saying it. It calls him "the leading candidate," but the credit remains uncertain.

• The earliest clear credit came in 1919, when Reverend Roy L. Smith quoted Wanamaker as saying: "I am convinced that about one-half the money I spend for advertising is wasted, but I have never been able to decide which half."

• The idea is older. Similar lines about half of advertising money being wasted appeared in the trade magazine Printers' Ink in 1890 and in Gunton's Magazine in 1897.

• Others get the credit too, including British soap maker William Lever (Lord Leverhulme), William Wrigley Jr. and George Washington Hill of the American Tobacco Company.

The common versions of the quote

• "Half the money I spend on advertising is wasted; the trouble is I don't know which half."

• "I am convinced that about one-half the money I spend for advertising is wasted, but I have never been able to decide which half." (1919)

• "Fifty cents out of every dollar I spent for advertising was wasted, but I could never be sure which fifty cents it was."

What the quote means

The problem in the quote is visibility. An advertiser could see total spend and total sales, but couldn't trace results back to the ads that produced them. So nobody knew which ads to cut without cutting the ones that worked.

Is it still true?

Digital advertising was supposed to settle the question. Every click, view and conversion gets counted. The "which half" question moved instead.

• The question moved from channels to creative. Most teams can say which channel drove results. Far fewer can say which ads, and which parts of those ads, did the work.

• Creative is the biggest driver and the most underrated. NCSolutions found creative drives 49% of incremental sales from advertising. When Advertiser Perceptions asked brands and agencies in 2024, they estimated 19%.

• Few teams act while money is being spent. In an April 2026 EMARKETER and Perion survey of US marketers managing $5M+ in annual media, 3.6% said they actively optimize creative, and 72% wait for performance to drop before changing it.

• The platforms grade their own work. Each ad platform reports results by its own rules, and privacy changes have made tracking a buyer across channels harder.

Nobody has a reliable figure for how much of today's ad spend is wasted. The quote's point holds: the waste is real, and most teams still can't pin down where it sits.

Where the wasted half hides today

• Ads left running after they've worn out their audience

• Budget spread across weak variations of a strong idea

• Channels judged on different definitions of a view or a conversion

• Reports that arrive after the budget is spent

• Lessons that never reach the next creative brief

How to find your wasted half

1. Track results for each ad. Campaign totals hide your best and worst performers.

2. Tag what's inside every ad: hook, format, message, offer and call to action. Then you can see why an ad won.

3. Put every channel in one view on the same definitions.

4. Review on a schedule that matches the decision: daily for live spend, weekly for tests, monthly for patterns.

5. Move budget while the campaign is still running. Pause fatiguing ads and scale breakout ones.

For the full method, see Creative Performance Measurement: The Complete Guide.

How mktg.ai helps

mktg.ai shows which parts of your creative are driving performance while the campaign is still running. It reads the ads you have live across TikTok, Meta, Google, LinkedIn and The Trade Desk. It flags the ones wasting budget and the ones worth scaling, so you know which half is which.

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Frequently asked questions

Who said "half the money I spend on advertising is wasted"?

It's most often credited to John Wanamaker. No direct record of him saying it has been found. The earliest clear credit to him dates to 1919, and similar lines appeared as early as 1890.

What is the exact quote?

The most common version: "Half the money I spend on advertising is wasted; the trouble is I don't know which half."

Is 50% of marketing budget really wasted?

There's no reliable single figure. The quote describes not knowing which spend works, and that problem still exists at the level of individual ads.

Did Lord Leverhulme say it?

William Lever, later Lord Leverhulme, is often credited in the UK. As with Wanamaker, no firm source has been found.

How do you know which half of your advertising is wasted?

Measure results for each ad, tag what's inside each one, compare channels on the same definitions and shift budget while campaigns run.

Related reading: What Is Creative Intelligence? · The Best Creative Analytics Tools in 2026, Compared

Sources: Quote Investigator (2022); NCSolutions and Advertiser Perceptions, via Westwood One (2024); EMARKETER and Perion (April 2026).