estimation · standard
Estimate the annual revenue of a Times Square billboard
How would you estimate the annual revenue of a single Times Square billboard?
The trap in this question is assuming one advertiser pays a flat daily rate for the whole screen, 365 days a year. A well-structured answer starts by picking a specific board type, then walks the revenue driver chain out loud: impressions, rotation structure, slot pricing, occupancy, and a CPM sanity check.
Structure a strong answer
strong
"Let me pick a scope first. I'll model a mid-sized non-prime digital board on the core Times Square block (44th to 47th Street), not a flagship spectacular like the Nasdaq MarketSite or One Times Square North Star. Those are a different market.
Step 1: Impressions per day. Times Square averages roughly 380,000 pedestrians daily (NYC BID data; peak days hit 1.5 million but the annual average is closer to the lower end). Not every pedestrian sees a given board. I'll apply 40% for viewing-angle coverage and 60% for attention rate on a well-placed digital screen. That gives: 380,000 x 0.4 x 0.6 = about 91,000 effective impressions per day. Call it 90,000.
Step 2: Rotation structure. A standard Times Square digital board runs a 60-second loop divided into 4 x 15-second slots. Each slot is sold independently. One screen serves four advertisers simultaneously, not one. This is the most commonly missed mechanic.
Step 3: Slot pricing. A non-prime 15-second rotation slot on a decent mid-block board runs $300 to $1,500 per day in direct sales. I'll use $800/day as a reasonable midpoint. At four slots: $800 x 4 = $3,200/day gross before vacancy.
Step 4: Occupancy. Prime Times Square boards run roughly 70-85% annual occupancy. Q4 and NYE command near 100% (NYE premiums can run 3-5x base rate); Q1 drops to around 60%. I'll use 75% as the annual average. Annual gross: $3,200 x 365 x 0.75 = approximately $876,000. Round to $900K.
Step 5: CPM sanity check. 90,000 impressions/day x 365 days = about 33 million annual impressions per slot. Revenue per slot at 75% occupancy: $800 x 365 x 0.75 = $219,000. Implied CPM: $219,000 / 33,000 = $6.60. The published OOH range for Times Square is $3-$8 CPM for standard rotation. That check passes.
Step 6: Premium board range. A large-format flagship (Nasdaq MarketSite, One Times Square North Star, Marriott Marquis full takeover) sells exclusivity, not rotation slots. Published rates run $1.1M to $4M per year for exclusivity, or roughly $300,000 per month for a full Marriott Marquis takeover.
Final answer: A typical mid-block Times Square digital board earns roughly $800K to $1M per year in ad revenue to the operator. A large-format flagship spectacular commands $1M to $4M. I'd land on $1M as a defensible benchmark midpoint. Happy to stress-test any assumption."
weak
"Times Square gets millions of visitors, so a billboard probably earns tens of millions a year." No decomposition, no rotation mechanics, no occupancy, no CPM check. Interviewers read this as pattern-matching to a big number. A slightly better but still failing answer assumes one advertiser pays a flat daily rate with zero vacancy: this overstates revenue by 15-40% and ignores that the screen is serving four advertisers at once, not one.
The 2026 wrinkle worth naming
In 2026, programmatic DOOH has changed the fill-rate math. Unsold inventory that used to sit at zero revenue now auctions in real time via DSPs at $15-$25 CPM, but for shorter, targeted buys. A current answer can split the revenue stack into two buckets: direct-sold inventory (brand campaigns, 4-week commitments, roughly $6-$8 CPM, about 60% of inventory) and programmatic fill on remaining impressions ($15-$25 CPM, lower volume, roughly 15% of inventory). True vacancy sits at around 25%. The blended effective CPM for a well-operated board in 2026 lands at $9-$11, versus $6-$7 in a purely direct-sold model. Naming this distinction signals genuine ad-market fluency, not textbook estimation.
What the interviewer is evaluating
The right answer is not the exact number. Interviewers are checking whether you (1) clarify scope before calculating, (2) decompose revenue into its actual driver chain rather than a single rate, (3) catch the rotation mechanic that most candidates miss, and (4) sanity-check your answer against a real-world reference like CPM ranges or named operator benchmarks. A candidate who arrives at $900K through clean structure and correct mechanics will outscore one who guesses $2M and cannot explain why.
For related estimation practice, see estimate Google queries per second and estimate Uber rides per day in NYC. For the pricing side of ad products, price an AI product covers the analogous revenue-driver decomposition.