So you’ve decided to sell on Amazon – congratulations. Now comes the next big decision: how do you actually get your products to customers? Amazon offers two main fulfilment options, FBA or FBM, and choosing the wrong one can significantly impact your profitability and customer satisfaction.
I’ve seen dozens of UK businesses navigate this decision, and there’s no universal answer. What works brilliantly for one business can be a struggle for another. Let me walk you through the realities of both options based on real-world experience – both from my time working at Amazon and from my subsequent years selling on the platform myself.
What is FBA and FBM?
Fulfillment by Amazon (FBA) means Amazon stores your inventory in their warehouses and handles all the picking, packing, shipping, and customer service. You send your products to Amazon, and they take care of everything else.
Fulfillment by Merchant (FBM) means you handle everything yourself – storage, packaging, shipping, and customer queries. Amazon provides the marketplace platform, but the logistics are entirely your responsibility.
At first glance, FBA might seem like the obvious choice. Who wouldn’t want Amazon to handle all the hard work? But as with most business decisions, the devil is in the detail.
The FBA experience: convenience at a cost
When I first encountered FBA it seemed revolutionary. Send your stock to Amazon, sit back, and watch the orders roll in. For many businesses, it genuinely transformed their operations.
The early days were much simpler – fewer fees, less complex storage requirements, and a more straightforward fee structure. However, nowadays, the system has become more complex, with tiered storage fees and seasonal adjustments.
The benefits are compelling. Your products get the coveted Prime badge, which matters more than you might think. Prime members spend significantly more on Amazon, and they often filter search results to show only Prime-eligible products. Without that badge, you’re essentially invisible to a huge portion of Amazon’s customer base. This Prime advantage became even more pronounced after Amazon Prime’s rapid expansion in the UK from 2010 onwards.
Customer service becomes Amazon’s problem, not yours. No more dealing with delivery complaints or returns processing. Amazon’s customer service team handles everything, and their systems are designed to resolve issues quickly to maintain customer satisfaction.
The logistics infrastructure is impressive too. Amazon’s fulfilment network can get products to customers faster than most businesses could manage independently. Next-day delivery isn’t just possible – it’s standard for Prime members.
However, the costs can be eye-watering. Storage fees vary by season, with peak charges during Q4 that can seriously impact your margins. I’ve seen businesses with slow-moving inventory receive storage bills that exceeded their monthly sales revenue.
The FBM reality: control with responsibility
FBM gives you complete control over your customer experience. You decide how products are packaged, how quickly orders are processed, and how customer queries are handled. This control can be crucial for premium brands or businesses with specific customer service requirements.
The cost structure is also more predictable. You know exactly what your shipping costs will be, and you’re not subject to Amazon’s fee increases or policy changes.
The challenge is that you’re competing against FBA sellers who can offer faster delivery and Prime eligibility. Your product might be identical and cheaper, but if it takes three days to arrive versus next-day delivery, many customers will choose the faster option. This competitive disadvantage has become more pronounced over time as Amazon has trained consumers to expect rapid delivery.
Customer expectations have also changed dramatically since Amazon’s early days. Amazon has trained consumers to expect rapid delivery and seamless returns. Meeting these expectations while managing costs requires significant operational expertise.
UK-specific considerations
The UK market has particular characteristics that affect this decision. Our geography means Amazon’s fulfilment centres can reach most of the country within 24 hours, making FBA’s speed advantage more pronounced than in larger countries.
Brexit has also complicated matters for businesses importing products. FBA can help with customs handling and compliance, but you’ll need to factor in the additional documentation and potential delays when sending inventory to Amazon’s warehouses.
UK consumers are also increasingly environmentally conscious. Amazon’s consolidated shipping and optimised logistics can actually reduce packaging waste compared to individual shipments, which some customers value.
FBA vs FBM Cost comparison: the numbers that matter
Let’s examine the real costs.
FBA fees in the UK typically include:
- Storage fees: £0.75 per cubic foot per month (higher during peak season)
- Fulfilment fees: £2-4 per standard item
- Return processing fees: £0.50-2.50 per item
- Removal fees if you need to get unsold inventory back
FBM costs depend on your setup:
- Packaging materials: £0.20-0.50 per item
- Shipping costs: £2-5 per item depending on speed and carrier
- Your time for processing and customer service
- Storage space and associated costs
The breakeven point varies, but FBA typically becomes cost-effective for businesses shipping more than 50 items monthly. Below that volume, FBM often provides better margins.
When FBA makes sense
FBA works particularly well for:
- Businesses selling standard-sized products under £100
- Companies without existing fulfilment infrastructure
- Seasonal businesses that need flexible storage
- Sellers targeting Prime members specifically
- Products with high sales velocity
- Businesses wanting to focus on marketing rather than operations
When FBM may be the better choice
FBM often suits:
- Large, heavy, or fragile products where FBA fees are prohibitive
- Businesses with existing efficient fulfilment operations
- Premium brands requiring specific packaging or presentation
- Products with low sales velocity
- Businesses selling high-value items where personal service matters
- Companies with tight margins where every penny counts
The hybrid approach
Many successful sellers use both methods strategically. Fast-moving, standard products go through FBA for the Prime advantage, whilst slower-moving or specialist items are fulfilled directly.
This approach requires more management but can optimise both costs and customer experience. One electronics brand sends popular accessories through FBA whilst fulfilling expensive electronics themselves to maintain control over the customer relationship.
The ability to seamlessly blend both approaches has improved significantly since FBA’s early days. Amazon’s seller tools and reporting have evolved to make managing a hybrid strategy much more feasible than it was in the mid-2000s.
Making the decision
Start by analysing your business fundamentals:
- What are your average order values and margins?
- How much inventory do you typically hold?
- Do you have existing fulfilment capabilities?
- Who are your target customers, and what do they value?
Consider starting with FBM if you’re new to Amazon and want to understand the platform without committing to higher fees. You can always transition to FBA once you understand your sales patterns and customer preferences.
For established businesses, calculate the true cost of both options including your time and opportunity cost. The cheapest option isn’t always the most profitable if it prevents you from growing your business.
The customer experience factor
Remember that Amazon customers have high expectations. If you choose FBM, you need to match or exceed the service levels customers expect. This means:
- Shipping within 24 hours of order placement
- Providing accurate tracking information
- Handling returns professionally and quickly
- Maintaining consistent stock levels
Failing to meet these expectations will hurt your seller metrics and ultimately your visibility on the platform. Having sold on Amazon myself, I can confirm that these performance metrics have become increasingly important for maintaining good standing and search visibility.
Looking ahead
Amazon continues to evolve its fulfilment options. New services like Amazon Logistics for FBM sellers and multi-channel fulfilment for FBA are blurring the lines between the two approaches.
Amazon’s logistics capabilities continue to expand, with same-day delivery becoming standard in many areas and new services constantly being tested and rolled out.
The key is remaining flexible and reviewing your decision regularly. What works today might not work as your business grows or market conditions change.
Final thoughts
The FBA versus FBM decision isn’t permanent, and it’s not binary. The most successful Amazon sellers treat fulfilment as a strategic choice that supports their broader business objectives.
If you’re starting to sell on Amazon, consider beginning with the method that aligns best with your current capabilities and customer expectations. You can always evolve your approach as you learn more about your customers and optimise your operations.
The Amazon marketplace rewards sellers who consistently deliver excellent customer experiences, regardless of how they fulfil orders. Choose the method that enables you to do that most effectively within your budget and operational constraints.
Success on Amazon isn’t just about having great products – it’s about getting them to customers efficiently and profitably. Whether you choose FBA, FBM, or a combination of both, make sure your fulfilment strategy supports your long-term business goals rather than just solving today’s challenges.
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