How Much Does It Cost to Develop a Lingerie or Swimwear Collection?
How Much Does It Cost to Develop a Lingerie or Swimwear Collection?
The question founders ask most often before they've committed to anything is: what is this going to cost? It's the right question to ask, and it almost never gets a useful answer.
The reason isn't that the answer is confidential. It's that most of the resources founders find when they search (forums, freelancer directories, brand founder interviews) describe one type of cost: the production cost. The cost per unit, the cost of the minimum order, the cost of the fabric. These are real costs. They're also the last costs, not the first ones. By the time you place a production order, you've already spent a significant amount that most founders did not account for when they built their initial budget.
This is the full cost architecture of developing a lingerie or swimwear collection, from the first design decision to the moment the production sample is approved. The figures reflect the UK market and typical ranges for independent brands working with quality-appropriate manufacturers. They will vary by complexity, supplier, and development route, but the structure is consistent.
Phase One: Design and Specification
Design Development and Technical Documentation
The design phase produces the documents a factory needs to understand what you want to make. This includes concept development, design refinement, technical drawings, and the most time-intensive document: the tech pack.
If you're working with a freelance designer or design studio, expect to pay between £1,500 and £4,500 per style for full design and technical documentation, depending on complexity. A simple non-wired bralette requires less technical documentation than a multi-component wired bra with a floating wire system. A basic swimsuit is less complex than a structured underwired swimwear style with internal boning and an adjustable closure.
If you have design capability in-house, you may be producing the creative work yourself, but the technical documentation (spec sheets, flat drawings to manufacturing standard, construction notes) still requires time and expertise. Many early-stage founders underestimate this cost because they're measuring time, not money. Translated into a commercial rate, it's the same cost. It's simply deferred rather than invoiced.
Development consultancy (if you're working with a product development partner rather than a design agency) typically sits between £2,500 and £6,000 per style for a full development package covering brief, specification, sourcing support, and sampling oversight. This is not the same as design. It's the strategic and technical layer that sits above design: deciding what to develop, how to develop it, and what standard it needs to meet before production.
Typical range for this phase: £3,000 to £12,000 for a first collection of four to six styles, depending on complexity and whether design and development are handled separately or together.
Phase Two: Fabric and Component Sourcing
Sourcing the fabrics, trims, and components for a first collection involves more cost than founders typically anticipate, and most of it is not recoverable if the project changes direction.
Fabric Samples and Lab Dips
Before a factory can cut your first sample, you need fabric. Fabric suppliers typically charge for memo samples and lab dips (colour dyeing trials matched to your Pantone references). Memo samples are usually charged at cost and sometimes refunded against a production order. Lab dips range from £25 to £80 per dip, per colour, depending on the supplier and fabric complexity. With four colourways across a range, using two to three fabrics, and needing two to three dip rounds to achieve accurate colour matching, fabric development alone can cost £600 to £1,800 before a metre of production fabric is ordered.
Component and Trim Samples
Underwires, hooks and eyes, rings and sliders, lace, elastic, and any custom-developed hardware all need to be sourced, sampled, and approved before production. Some components are available off-the-shelf from specialist suppliers. Others (particularly if you have a custom hardware requirement or a branded label) need to be developed, which adds time and cost. Budget between £200 and £800 for component sourcing depending on the complexity of your trim package.
Typical range for this phase: £800 to £2,600 for a first collection, excluding production-quantity fabric orders.
Phase Three: Sampling
This is the phase most founders know is expensive and still tend to underestimate.
First Sample Cost
First samples in lingerie and swimwear are priced as prototypes, not as production units. A factory producing a first sample is making one garment to a new specification, which involves pattern drafting, block adjustment, component sourcing at sample quantity, and skilled construction with no production efficiencies. First sample costs typically range from £180 to £450 per style for a straightforward design, and £350 to £800 or more for complex structured styles.
The first sample almost never passes. This isn't a failure. It's how the process works. The first sample is a physical test of the specification: the point at which assumptions become visible and decisions that seemed clear on paper turn out to require revision. Budget for at minimum two rounds of sampling per style, and three rounds for anything with significant structural complexity.
Revision Sample Cost
Each revision round costs between 60% and 100% of the first sample cost, depending on how many changes are required. There is no such thing as a free revision. A factory that doesn't charge separately for revision rounds will factor the cost into their overall pricing or into the production cost. It shows up somewhere.
Fit Model Cost
Every sample needs to be assessed on a body, not just on a hanger. A professional fit model session costs between £200 and £600 per session, depending on the model's rate and session length. If you're fitting multiple styles in one session, this cost distributes efficiently. If you're fitting one style at a time across multiple revision rounds, it compounds quickly.
Some founders use staff, friends, or personal contacts as informal fit references rather than professional fit models. This is a legitimate decision for early concept assessment, but professional fit models exist for a reason: their measurements are documented, consistent, and industry-standard. Fitting to a non-standard reference and then trying to grade out to a size range from that starting point creates fit problems that become expensive to resolve later.
Shipping Costs
International sample shipping (particularly from South and Southeast Asian manufacturing hubs) costs between £80 and £250 per parcel depending on weight, destination, and urgency. A courier service that guarantees three to five working days is significantly more expensive than economy freight, and most founders working to a deadline use the faster option. Across three revision rounds, this line item can reach £600 to £1,500 for an international manufacturing relationship.
Typical range for this phase: £3,500 to £9,000 for a first collection of four to six styles through two to three revision rounds, including fit sessions and shipping.
Phase Four: Grading and Size Set Approval
Once a style is approved at the sample size, it needs to be graded to the full size range you intend to sell. Grading is the process of scaling the pattern up and down according to a set of grade rules, and then sampling the graded sizes to confirm the fit is consistent across the range.
Grading cost depends on complexity and the number of sizes. A basic grade for a four-size range (covering approximately sizes 8 to 16, or equivalent cup sizes) costs between £150 and £400 per style. A full inclusive range covering six to eight sizes is proportionally more. For a collection of five styles graded to six sizes, grading alone is between £750 and £2,000 before the graded samples are cut.
The graded size set (one sample of each size, cut in production-equivalent fabric for approval) costs a similar amount to the original sampling rounds. Most founders are not expecting this cost. The size set approval is not a formality. It's the stage at which fit problems specific to the extreme ends of the size run become visible. Resolving those problems at size set stage is significantly less expensive than resolving them after production has been completed.
Typical range for this phase: £2,000 to £5,500 for grading and size set approval across a full first collection.
Phase Five: Pre-Production and Compliance
Testing and Compliance
Depending on your target market and product category, you may be required to meet specific standards before selling. In the UK, nightwear for children requires fire safety compliance. All garments sold to consumers must meet labelling requirements for fibre composition, care instructions, and country of origin. For swimwear making specific performance claims (UPF-rated, chlorine-resistant), those claims need to be substantiated by test reports from accredited laboratories.
Testing costs range from £150 to £800 per test depending on the test type and the laboratory. This is not optional and is not a cost that can be deferred to a later production run.
Labelling and Packaging Development
Woven labels, swing tags, care labels, and packaging need to be designed and sourced. For an independent brand at first collection stage, this typically costs between £500 and £2,000 depending on design complexity, materials, and minimum order quantities with label and packaging suppliers.
Typical range for this phase: £700 to £2,800 for pre-production, testing, and labelling across a first collection.
What This Looks Like as a Total
Across all five phases, the pre-production investment for a first lingerie or swimwear collection of four to six styles, developed to a quality standard appropriate for an independent premium brand, typically falls between £10,000 and £32,000 before a production order is placed.
This is the budget that needs to exist before the question of production cost becomes relevant. Production cost (the per-unit cost of manufacturing at minimum order quantity) is a separate line, and for a collection of four to six styles at an MOQ of 150 to 200 units per style, that figure adds a further £18,000 to £90,000 depending on production complexity, factory location, and garment category.
The combined investment for a first collection from development through first production is therefore typically in the range of £28,000 to £120,000, depending on scale and ambition.
Most founders who start with a development budget of £5,000 to £8,000 are not accounting for pre-production at all. They're budgeting for production. When the pre-production costs arrive (which they always do, because development always costs money), they are not prepared for them. The project stalls. The timeline extends. The commercial opportunity the collection was built for gets harder to reach.
The Cost of Developing Badly
The costs above assume a reasonably well-managed development process with competent technical documentation, a clear brief, and a factory that can produce to specification. An undermanaged process (unclear briefs, incomplete specs, wrong fabric choices, unresolved sampling issues carried forward) does not reduce these costs. It increases them.
Every additional revision round, every resourcing mistake, every design change made mid-sampling because the brief wasn't clear at the start, adds cost. The development budget for a poorly managed first collection doesn't converge toward production. It expands away from it, consuming capital that was earmarked for inventory or marketing, and compressing the timeline until the launch window closes.
Investing in proper development (in documentation, in technical oversight, in fabric validation, in the right fit process) doesn't add cost to product development. It reduces it. The brands that develop efficiently are not the ones that spend more. They're the ones that spend once, in the right places, in the right order.
Sarah Denise Studio works with lingerie and swimwear founders from the planning stage through to production-ready specification. If you're building your first collection budget and want a clear picture of what the full process actually costs before you commit to it, book a consultation call.