Why $15 a Day Isn't Enough for Your Psychology Practice's Google Ads
In April I worked with a psychologist to go through their Google Ads data. The campaign was on $15 a day. Reviewing the share of impressions lost to budget showed we were missing out on searches because the budget ran out before the searches did. I suggested raising it, and we stepped it up to $30, then to $57 about two weeks later, the figure Google Ads' budget modelling pointed to. Here is what the account produced:
- 30 days to 4 May: about 3 bookings.
- 30 days to 21 June: 13 or 14 bookings, at roughly $120 each.
- 30 days to 14 September: about 11 bookings, at around $151 each.
- 30 days to 14 October: about 7 bookings so far, at around $224 each. Late bookings are likely to lower that figure.
Then the cost of a click roughly tripled. The same $57 a day bought about 36 clicks at May's average CPC and about 10 at October's.
This is the weekly data from that account, 20 April to 5 October 2026, including the parts we can't fully explain. The main thing I took from it is that a daily budget isn't a number you set once. It's the result of a formula, and the inputs move. This article uses the same account as Noticed Your Psychology Google Ads Aren't Performing? Here's Why and How to Fix It.
Starting point: $15 a day and about 3 bookings a month
The practice was spending $15 a day on Google Ads. In my experience that was enough two years ago. We spotted the problem by reviewing the account's lost impression share. In the week of 20 April, 54% of the impressions the campaign was eligible for were lost to budget alone. The budget ran out before the searches did.
I suggested stepping up in two stages, and the practice agreed: to $30 a day on 22 April, then to $57 in the first week of May.
The $57 came from Google Ads' campaign modelling, which showed the account would be more competitive at that level. It also fitted the data: at $30 a day the account was still losing 49% of its eligible impressions to budget, which suggested there was room to grow, and the practice was hoping for around six bookings a month.
Raising the budget worked, and it changed what we were losing
The effect on volume was immediate. Weekly impressions rose from 1,490 in the week of 20 April to 4,308 in the week of 4 May, and 5,975 the week after. Clicks went from 85 to 264 a week over the same period, at a steady $1.54 to $1.63 a click through May.
Budget-lost impression share, the share of eligible searches we missed because the daily budget ran out, fell from 54% to 8%.
Lost-to-budget share fell from 54% to 8% in May, then topped 50% from July
Share of eligible impressions lost to each cause, by week. Marked: 1 = budget $15 to $30 (22 Apr), 2 = budget to $57 (4 May). Missing points were not reported or not exported.
| Week starting | Lost to budget | Lost to rank |
|---|---|---|
| 20 Apr | 54% | 44% |
| 27 Apr | 49% | 49% |
| 4 May | 8% | 90% |
| 11 May | blank in export | 90% |
| 18 May | blank in export | 90% |
| 25 May | blank in export | 90% |
| 1 Jun | blank in export | 90% |
| 8 Jun | 28% | 64% |
| 15 Jun | 7% | 88% |
| 22 Jun | not exported | not exported |
| 29 Jun | not exported | not exported |
| 6 Jul | not exported | not exported |
| 13 Jul | 66% | 24% |
| 20 Jul | 68% | 24% |
| 27 Jul | 73% | 19% |
| 3 Aug | 82% | 8% |
| 10 Aug | 77% | 10% |
| 17 Aug | 84% | 10% |
| 24 Aug | 90% | 6% |
| 31 Aug | 86% | 11% |
| 7 Sep | 74% | 22% |
| 14 Sep | 68% | 26% |
| 21 Sep | 54% | 40% |
| 28 Sep | 68% | 28% |
| 5 Oct | 69% | 27% |
The surprise was rank. Impression share lost to ad rank went from 44% to about 90%. My reading is that the extra budget let the account into far more auctions, and it lost most of the new ones. Budget decides how many auctions you can enter. Bids and ad quality decide whether you win them. The export can't prove that reading.
Real bookings followed the clicks: about 3 in the 30 days to 4 May, then 13 or 14 in the 30 days to 21 June, at roughly $120 each.
A note on counting. The account's "conversions" column showed up to 22 a week in May. Those were clicks on the Book a Session link, not bookings. In the 60 days to 21 June there were 87 link clicks and 29 completed bookings. Everything in this article uses completed bookings.
The week $57 stopped buying what it used to
In the week of 8 June the average cost per click jumped from $1.63 to $4.15. Clicks on the booking link fell from 22 that week to 2. The cost per click never came back down: from mid-July the weekly average sat between $4.17 and $6.59, against $1.54 to $1.63 in May.
In early June the account was also moved to automated bidding, so the jump coincides with that as well as with more competition for the same searches, or a change in which searches we were winning. The data can't separate them.
The budget didn't change, but what it bought did. At May's $1.57 a click, $57 a day buys about 36 clicks. At the $5.99 of the week of 5 October it buys about 10.
Cost per click roughly tripled from 8 June: $57 a day now buys about 10 clicks, not 36
Average cost per click by week. Clicks a day = the daily budget ($57) divided by that week's average cost per click. Google can spend more than the daily budget on some days. Missing weeks were not exported.
| Week starting | Average cost per click | Clicks a day at $57 |
|---|---|---|
| 20 Apr | $1.82 | about 31 |
| 27 Apr | $1.77 | about 32 |
| 4 May | $1.60 | about 36 |
| 11 May | $1.57 | about 36 |
| 18 May | $1.59 | about 36 |
| 25 May | $1.54 | about 37 |
| 1 Jun | $1.63 | about 35 |
| 8 Jun | $4.15 | about 14 |
| 15 Jun | $3.18 | about 18 |
| 22 Jun | not exported | not exported |
| 29 Jun | not exported | not exported |
| 6 Jul | not exported | not exported |
| 13 Jul | $4.83 | about 12 |
| 20 Jul | $5.49 | about 10 |
| 27 Jul | $4.29 | about 13 |
| 3 Aug | $4.41 | about 13 |
| 10 Aug | $4.17 | about 14 |
| 17 Aug | $4.88 | about 12 |
| 24 Aug | $6.37 | about 9 |
| 31 Aug | $6.59 | about 9 |
| 7 Sep | $5.26 | about 11 |
| 14 Sep | $5.13 | about 11 |
| 21 Sep | $4.88 | about 12 |
| 28 Sep | $6.00 | about 10 |
| 5 Oct | $5.99 | about 10 |
That feeds straight through to bookings, though bookings fell less steeply than the click price rose. The 30 days to 21 June produced about 13 or 14 bookings at roughly $120 each. The 30 days to 14 September produced about 11 at around $151 each. The 30 days to 14 October produced about 7 so far at around $224 each, and late bookings are likely to lower that.
Why people click on Tuesday and book on Wednesday
In the psychologist accounts I manage, clicks usually spike before a booking appears. A typical pattern is 15 clicks to the practice's website on a Tuesday, then the booking on Wednesday.
People rarely book on the first search. They look at a few practices, leave, and search again later. It takes 27 to 55 clicks to generate one booking. If your ads have run out of budget by the time they come back, you haven't lost one click. You've lost the visit that would have become the booking.
The hour-of-day data fits, though it doesn't prove it. In the 60 days to 21 June, about a third of spend fell after 6pm. In the 30 days to 14 October it was 22%, and noon alone took 12% of the day's spend. That looks like a budget running out earlier in the day.
How to work out your own daily budget
Start from the cost of a booking, not from a daily figure. Cost per booking is your cost per click multiplied by the number of clicks it takes to get one booking. Your daily budget follows from how many bookings you want:
Here is this account in three windows, with the daily budget needed for 14 bookings a month. Clicks per booking is clicks divided by bookings in the same window.
| Window | Clicks | Bookings in window | Average CPC | Clicks per booking | Cost per booking | Daily budget for 14 bookings a month |
|---|---|---|---|---|---|---|
| 60 days to 21 Jun | 1,583 | 29 | $1.91 | about 55 | about $104 | about $49 |
| 15 Aug to 14 Sep | 305 | 11.2 | $5.52 | about 27 | about $151 | about $70 |
| 15 Sep to 14 Oct | 294 | 7.0 | $5.33 | about 42 | about $224 | about $105 |
How to read these numbers: this is one account with small counts (7 to 29 bookings per window), so read the figures as a range, not a precise result. Bookings are fractional because Google splits credit across touchpoints. The newest window is provisional because bookings arrive days or weeks after the click. The windows also differ in CPC, ad rank, bidding settings, keyword mix and landing page, so they show direction, not a controlled comparison.
The 60-day window includes the weeks before the June price jump, which is why its cost per booking ($104) is lower than the $120 for its final 30 days. Clicks did get better, from about 55 per booking to between 27 and 42, but not enough to offset a click that costs nearly three times the 60-day average. I can't say what drove the improvement.
Three numbers are worth checking every month: average CPC, completed bookings, and the two lost impression share columns (Search lost IS for budget and for rank, under Competitive metrics when you edit columns). When budget-lost share is high, the account is limited by what you're spending. In this account it was above 50% every week from 13 July.
Your fix checklist
- Count completed bookings, not clicks on the booking link. In this account the conversions column showed 87 link clicks against 29 bookings.
- Work out your cost per booking, then your daily budget from it. Use the formula above, with your own CPC and clicks per booking, not a number that feels right.
- Check average CPC, completed bookings and both lost impression share columns every month. Budget-lost share tells you what your spend is limiting. Rank-lost share tells you what bids and ad quality are costing you.
- Raise the budget in steps and watch rank-lost share. Budget decides how many auctions you enter. Bids and ad quality decide whether you win them.
- Re-run the formula whenever CPC moves. The same $57 bought about 36 clicks a day in May and about 10 in October.
- Look at the hour-of-day report for spend running out early. If a large share of spend lands before lunch, the budget may be gone by the time people come back to book.
If you'd like a second pair of eyes on what your own account is counting, get in touch with firstSites or book a call.