Remember when it was just teenagers doing dance challenges? Those days are long gone. Today, it’s one of the fastest-growing advertising platforms, with brands using it to reach audiences in engaging, visual ways. And we’re talking serious money here. They’re on track to hit 33 billion USD in ad revenue this year alone.
Here’s the thing though. Creating brilliant videos is only half the battle. The real magic happens in how you bid for those precious advertising spots. Get your bidding strategy wrong and you might as well be throwing money down the drain. Get it right, you’ll see your return on ad spend (ROAS) and cost per acquisition (CPA) improve dramatically.
Now, TikTok keeps things refreshingly simple. There are two primary bidding strategies. Cost Cap and Maximum Delivery. Don’t let the simplicity fool you though. Choosing between them can make or break your campaigns.
- Cost Cap is your go-to when you need predictable costs. It’s your ‘sensible friend’ who always sticks to budgets. It’s ideal for campaigns with clear ROAS or CPA targets.
- Maximum Delivery is spend-focused. It aims to maximise conversions from your budget and prioritises scale over cost control. It’s like that friend who says ‘let’s spend everything and see what happens.’ But in a good way.
If you’re new to TikTok or want tailored support, you can book a strategy session with our team.
How TikTok Ads Bidding Actually Works
TikTok ads operate through an auction system. But it’s not as straightforward as highest bidder wins. Advertisers compete for placement based three key things: bid, audience and campaign objective.
Here’s where it gets interesting. TikTok doesn’t just hand victory to whoever throws the most money at it. The algorithm considers how likely someone is to actually convert after seeing your ad. It looks at things like how relevant your ad is. Are people likely to engage with it? How have similar ads have performed.
What this means is that a high budget or bid won’t guarantee you success. Your ad has to resonate with your audience and match your campaign objective. It’s quite refreshing, actually.
- Cost Cap
TikTok optimises delivery to achieve your target CPA or ROAS over time. You might pay £3 for one conversion and £7 for another. But TikTok aims to average out at your target cost. It’s brilliant for campaigns where you need predictable costs like app installs, lead generation or purchases.
- Maximum Delivery
This takes a different approach entirely. TikTok spends the full daily budget to maximise the number of conversions, clicks or actions. The cost per action might bounce around a little. But you’re maximising your reach and results.
Our TikTok advertising services can help you structure your campaigns, choose the right bidding strategy and monitor performance for maximum ROI.
Cost Cap: When You Need Predictable Costs
Cost Cap is a favourite strategy when you’ve got clear targets. It’s performance-driven but gives you the control you need over your average cost per result.
The clever bit is how TikTok handles each individual auction. When the algorithm spots a user who’s very likely to convert, it bids more aggressively. When the chances are lower, it holds back. It helps you avoid unnecessary spending.
Here’s what you need to know:
- Use Cap Cost for campaigns where CPA or ROAS are non-negotiable. I’m talking about campaigns for app installs, lead generation or e-commerce sales, for example. Campaigns where you know exactly what a customer is worth to you.
- Set you daily budget somewhere between five and fifty your Cost Cap target. This gives the algorithm enough wiggle room to work efficiently without going overboard on spend.
- Regular monitoring is needed. Review conversion trends, adjust bids and refresh ad creatives. This will keep campaigns relevant and competitive.
Cost Cap is particularly useful if you want to test different audiences or try new creative approaches without the fear of costs spiralling out of control. It’s like having a safety net to experiment confidently.
Maximum Delivery: When Scale Matters Most
Maximum Delivery is your best mate when you need to make the most of a fixed budget. It’s designed to make the most of your allocated budget. Instead of targeting a specific cost per result, TikTok delivers as many conversions, clicks or actions as possible within your daily allocation.
How it works:
- The platform automatically spreads your budget across auctions in real time.
- You don’t set a bid. TikTok handles everything to maximise results.
- Just bear in mind that you’ll need to use daily budgets. Lifetime budgets aren’t supported.
The benefits are pretty compelling:
- Your budget gets used consistently. Even on days with higher competition or lower efficiency. There’s nothing worse than underspending when you’re trying to hit targets.
- You’ll gather data much faster. It’s crucial for testing new creatives and audience segments. The algorithm learns quickly. And so do you.
- It’s perfect for campaigns focused on scale, brand awareness or short-term promotions. Ones where maximum reach trumps cost control.
TikTok recommends aiming for around 50 conversions per day to give the algorithm enough data to work with. If you’re running smaller campaigns, don’t worry. You can still benefit from this approach, just adjust your expectations accordingly.
When you’re ready to scale, gradual daily increases of around 20% are advised. This keeps performance stable.
Real-World Examples
To illustrate how these bidding strategies could work in practice, let’s consider a couple of examples.
Imagine a small online retailer launching a lead generation campaign. By using the Cost Cap strategy, they set a target cost per lead of £4.50. TikTok optimised delivery to prioritise auctions where users were most likely to convert.
Over several weeks, their cost per lead stayed predictable, which meant they could confidently increase their daily budget without any nasty surprises. The predictability meant they could test different audience segments and creative formats efficiently. Ultimately, it helped them scale the campaign confidently.
In another example, a mid-sized cosmetic brand runs a short-term summer promotion. They choose Maximum Delivery to maximise reach and conversions within a fixed daily budget. The platform fully spent the budget each day, and while the cost per conversion fluctuated slightly, the overall volume of leads and purchases increased rapidly.
The brand gained brilliant insights into which creatives and audience segments responded best. Data they later used to run more controlled Cost Cap campaigns. It’s a perfect example of how the strategies complement each other.
For tailored support in setting up either strategy, our PPC services can help structure campaigns for maximum ROI.
Keeping Your Campaigns on Track
Choosing the right bidding strategy is just the start.
The real work happens in the ongoing monitoring and optimisation. TikTok campaigns can shift. It could be due to seasonality, audience behaviour changes or competitor activity. Regular check-ins is essential.
Keep an eye on these metrics:
- Click-through rate (CTR). This tells you how engaging your ads are. If this drops, it’s time for a refresh.
- Conversion rate. This shows how well your audience completes the desired action. A good CTR with poor conversions might mean your landing page needs work.
- Cost per acquisition (CPA). This ensures your campaigns stay profitable. Watch for trends rather than daily fluctuations.
- Spend trends and budget pacing. This helps you spot under- or overspending. Before it becomes a problem.
Even with the right strategy, small tweaks can make a huge difference. Regularly review search terms, test new creatives, and refine audience segments. For example, A/B testing multiple ad variations can reveal which messaging resonates best. Adjusting Cost Caps or budgets based on real-time data helps maintain efficiency.
Hybrid Strategy Tips
Here’s something that can be really effective: combining both strategies for maximum impact.
Start with Maximum Delivery during the first week of a campaign to gather conversion data quickly. This helps the algorithm learn which creatives, audiences and placements perform best.
Once enough data is collected (aim for at least 50 conversations), switch to Cost Cap to maintain predictable cost while continuing to optimise results efficiently.
For even better results, consider pairing this approach with remarketing campaigns of dynamic product ads to target users who have already engaged with your brand. This combination maximises both scale and cost efficiency.
Our experts can help you create a hybrid bidding strategy in one of our strategy sessions.
Creative Optimisation and Testing
Here’s something that can’t be overstated. Your bidding strategy won’t save poor creatives. TikTok campaign performance depends heavily on having ads that resonate.
Create multiple variations of your video ads from the start. Try different hooks, captions, CTAs or visual styles to see which combinations deliver the best results. For example, try a playful, fast-paced opening. Then, a slower, product-focused introduction. TikTok’s algorithm benefits from having enough creative variations to learn which ads perform best in different audience segments.
Don’t forget about audience testing either. Segment your target groups by demographics, interests or behaviours and measure how each responds to different creatives. This helps identify high-performing audiences that justify higher spend or Cost Cap adjustments.
A/B testing should be ongoing. Regularly review metrics like CTR, conversion rates and engagement to determine which ads are underperforming and which are driving results. Use these insights to refine your messaging and creative approach.
For Maximum Delivery campaigns, fresh creatives prevent ad fatigue. It means your budget continues to be spent efficiently. For Cost Cap campaigns, creative testing allows you to maintain predictable costs while improving conversion rates.
Planning for Seasonal Adjustments and Trends
TikTok campaign performance can fluctuate due to seasonality, trending topics and audience behaviour changes. Planning for these changes means your bidding strategy continues to deliver results throughout the year.
During peak seasons like Christmas, product launches or limited-time promotions, consider adjusting your bidding strategy temporarily to Maximum Delivery. This will capture the largest possible audience and maximise conversions. Outside of peak periods, Cost Cap helps maintain predictable costs. Costs you need for planning.
Monitor CTR, conversion rates, cost per acquisition (CPA) and overall spend trends. Compare current performance to historical data to identify patterns or anomalies. A sudden spike in CPA could indicate increased competition. It requires a temporary Cost Cap adjustment, perhaps, or a creative refresh.
Mistakes That’ll Cost You Money
Even experienced advertisers make these common mistakes with TikTok bidding:
- Setting Unrealistic Cost Cap targets. Being too aggressive with your CPA or ROAS goals can limit delivery and waste learning opportunities. Start conservative. Optimise from there.
- Ignoring audience data. Both strategies perform best with well-defined, properly segmented audiences. Don’t just blast for everyone and hope for the best.
- Changing budgets too quickly. Rapid adjustments can disrupt algorithm learning. And cause fluctuations in CPA. Gradual, data-driven changes work much better.
Avoiding these pitfalls ensures that your campaigns stay on track, whether you’re focusing on efficiency with Cost Cap or scaling with Maximum Delivery.
Which Strategy Should You Actually Choose?
Ultimately, the right TikTok bidding strategy depends on your goals, budget and campaign stage.
Choose Cost Cap when:
- Cost predictability is crucial.
- You have a clear CPA. Or ROAS targets you need to hit.
- You want to test audiences or creatives without overspending.
- You’re in a competitive market with fluctuating auction prices
Choose Maximum Delivery when:
- Scale and reach matter more than precise control.
- You’re launching new campaigns and need data quickly.
- You have fixed budgets that must be used in full.
- You’re running time-sensitive promotions or building brand awareness.
The smartest approach is often the hybrid method: start with Maximum Delivery to gather performance data, then switch to Cost Cap once you have enough conversions to guide optimisation. Over time, testing both strategies will help you refine your campaigns for the best ROI.
For hands-on support in implementing these strategies, contact us for expert guidance.
Extra Tips for Better Performance
It’s not just about choosing between Cost Cap and Maximum Delivery. These additional best practices can significantly improve campaign performance and ROI:
- Make sure your creatives actually speak to your audience. TikTok rewards relevance heavily. Ads that resonate with users are more likely to achieve lower CPAs and higher engagement.
- Regularly refresh your video assets to avoid ad fatigue, particularly in high-frequency campaigns. What worked brilliantly last month might be stale today.
- Narrow your targeting to specific interests, behaviours or demographics. The more precisely you target users likely to convert, the better both strategies perform.
- A/B testing remains essential. Experiment with formats, messaging and CTAs to understand what drives conversions. Even small tweaks in creative or copy can improve results over time.
- Monitor metrics closely. Track CTR, CPA, ROAS and conversion trends regularly to catch issues early and adjust strategies accordingly.
Conclusion
TikTok’s advertising platform has serious potential. But success comes down to choosing the right bidding strategy and executing it properly. By understanding when to use Cost Capversus Maximum Delivery, combined with ongoing monitoring and optimisation, you can achieve strong results. Whether that’s predictable cost efficiency or maximum scale.
Start with clear objectives. Track the right metrics that matter. And adjust your approach as the data comes in. With the right strategy and execution, TikTok ads can drive meaningful growth for your business.
The key is treating it as an ongoing conversation with your audience. It’s not a set-and-forget advertising channel. Keep testing. Keep optimising. And keep learning from what the data tells you.
