It is the first question almost every business owner asks before running Google Ads, and the hardest to get a straight answer to. Google will happily take any number you give it. Agencies quote wildly different figures. So you are left guessing whether 10,000 THB a month is serious or a waste of time, and whether 100,000 THB is ambitious or reckless.
This guide gives you a clear way to set a Google Ads budget for a business in Bangkok or anywhere in Thailand. No vague "it depends", just the numbers that actually drive the decision and a simple formula you can run on your own account today.
Most small and mid-sized service businesses in Bangkok spend between 20,000 and 80,000 THB per month on Google Ads, plus management. The right number is not a fixed figure. It is your target number of new customers, multiplied by what a click costs in your sector, divided by how often a click turns into a lead. Set the budget from that math, not from a round number that feels safe.
Key takeaways
- Budget follows goals and cost per click, not the other way round. Decide how many leads you need first.
- Cost per click in Thailand typically runs 8 to 45 THB for local services, and far higher in law, medical and property.
- Going too small starves the account of data, so the algorithm never learns. There is a floor below which ads rarely work.
- Reserve part of the budget for the landing page and conversion tracking, or the clicks you buy leak away.
- Management is a separate cost from what Google receives. Factor it in before you commit.
Why there is no single "right" number
A dental clinic in Thonglor, a law firm in Sathorn and a coworking space in Ari can run the same 40,000 THB budget and get completely different results. The reason is that three things vary enormously between businesses: how much a single customer is worth, how much competitors are willing to pay per click, and how well the website turns a visitor into an enquiry.
So the useful question is not "what should I spend?" but "what do I need to spend to hit my goal, given my numbers?" The steps below build that up piece by piece.
Start from a goal, not a number
Before you look at budgets, decide what a win looks like. Is it 15 new patient enquiries a month? 10 qualified property viewings? 30 booked consultations? Put a real figure on it. Everything downstream depends on this one target.
Then work out what one new customer is worth to you. If an average client is worth 20,000 THB and you close one in four leads, each lead is worth roughly 5,000 THB to your business. That number is the ceiling on what you can sensibly pay to generate a lead, and it anchors the whole budget.
Know what a click actually costs in Thailand
Cost per click is the single biggest driver of your budget. The more competitive and commercial your sector, the more each click costs. These are typical ranges we see for search campaigns targeting Thai and expat audiences. Treat them as planning benchmarks, not guarantees, since your own account will settle at its own numbers.
| Sector | Typical cost per click | Competition |
|---|---|---|
| Restaurants and cafes | 8 to 25 THB | Moderate |
| Wellness, spa, fitness | 12 to 35 THB | Moderate |
| Clinics and dental | 35 to 90 THB | High |
| Cosmetic and aesthetic | 45 to 120 THB | Very high |
| Law and professional services | 40 to 110 THB | Very high |
| Real estate and property | 30 to 100 THB | High |
Two searches in the same city can differ tenfold. "Coffee near me" is cheap. "Best cosmetic surgeon Bangkok" is not, because every click may be worth a large amount to the business that wins it.
Run the minimum-viable-budget formula
Here is the simple math that turns your goal into a number. You need three inputs: your target leads per month, your cost per click, and your landing page conversion rate (the share of clicks that become an enquiry). A realistic conversion rate for a decent landing page is 3 to 8 percent.
Monthly budget = target leads ÷ conversion rate × cost per click
Say a clinic wants 20 enquiries a month, converts 5 percent of clicks, and pays 50 THB per click. That is 20 ÷ 0.05 = 400 clicks, times 50 THB, which is 20,000 THB per month in ad spend. Want 40 enquiries? Double it. If your conversion rate is weaker at 3 percent, the same 20 leads now needs about 33,000 THB. Small changes in the website move the budget more than most owners expect.
- Estimate conservatively. It is better to be pleasantly surprised than to overpromise the budget.
- If the number looks scary, the fix is usually a better landing page, not a bigger budget.
- Recheck the formula after 6 to 8 weeks with your real account data.
Match the budget to your business stage
Where you are matters as much as your sector. A brand-new account needs enough spend to gather data before the algorithm can optimise. A mature account can scale on proven performance. Use these tiers as a starting point, then let the formula in step three refine them.
| Stage | Monthly ad spend | What it buys you |
|---|---|---|
| Testing | 15,000 to 25,000 THB | One tight campaign, enough data to learn what converts |
| Growing | 30,000 to 60,000 THB | Multiple campaigns, steady lead flow, room to optimise |
| Scaling | 70,000 THB and up | Proven winners scaled, new services and areas added |
Below roughly 15,000 THB a month in a competitive sector, the account often cannot collect enough conversions for smart bidding to work. If that is all you have, narrow your targeting hard: one service, one small area, exact keywords. A small budget spent narrowly beats a small budget spread thin.
Budget for the page and the tracking, not just the clicks
This is where most Bangkok budgets quietly leak. You can win the auction, pay for the click, and still get nothing if the visitor lands on a slow homepage with no clear next step. The click is only half the purchase. The other half is what happens after it.
Before you scale spend, make sure the money you already pay for has somewhere good to land. A dedicated landing page built to convert and proper conversion tracking will often do more for your cost per lead than adding budget. Without tracking, you are also flying blind, and Google cannot optimise toward outcomes it cannot see.
- Send each campaign to a page that matches the search, not the homepage.
- Track calls, form submissions and message clicks as conversions.
- Make sure the page loads fast on mobile, where most Thai searches happen.
Account for management and review time
The money Google receives is not the whole cost. Someone has to build the campaigns, watch the search terms, cut waste and test new copy every week. That is either your time or a fee. Agencies usually charge a flat retainer or a percentage of spend, often around 10 to 20 percent. On a small account a flat fee is fairer, because a percentage of a tiny budget will not fund real optimisation.
Decide this before you commit, so the ad budget and the management cost do not compete. A well-managed 30,000 THB account almost always beats an unmanaged 50,000 THB one. If you would rather focus on the business, our Google Ads management in Bangkok covers strategy, setup and ongoing optimisation with transparent reporting.
If you cannot yet answer "how much does one lead from Google Ads cost me?", do not increase spend. Fix tracking first. That single number tells you whether to scale, hold, or rebuild, and it changes every budget decision you make afterwards.
So, what should you actually spend?
For most service businesses in Bangkok starting out, a realistic and productive range is 20,000 to 40,000 THB per month in ad spend, plus management, aimed at one or two core services. Competitive sectors such as cosmetic clinics, law and property should expect the higher end because clicks cost more. Once you know your real cost per lead, the formula in step three replaces the guesswork entirely.
Google Ads is one lever. It buys demand that exists right now. If you also want to be found when people search or ask AI tools for recommendations, it works best alongside SEO and organic visibility, which keep paying off after the ads stop.
Not sure what your number should be?
Tell us your goal and your sector, and we will map out a realistic Google Ads budget and what it should return. No jargon, no pressure.
Get a Free Budget Plan →