The verdict in three sentences
A good ecommerce specification for a cosmetics brand in New York runs 10 to 15 pages and turns every wish into a measurable requirement: product count, page speed, accessibility level, tax accuracy. For 80 to 300 products, cards and wallets, multistate sales tax and FDA compliant product information, plan 25,000 to 120,000 USD to build and 800 to 3,000 USD a month for maintenance and apps. Without this document, quotes cannot be compared and two agency proposals can differ by a factor of three.
The specification template, ready to fill in
The founder of a Brooklyn cosmetics brand built on argan oil (oils, creams, cleansers, gift sets), sold through independent beauty stores and a few retail chains, wants to grow direct online sales across the US and later Canada. Here is the template to complete, section by section.
| Section | What to write | Measurable requirement |
|---|---|---|
| Context and goals | Online revenue target, wholesale versus direct split | Example: 900,000 USD in year one, 40 % repeat orders |
| Catalogue | Product count, sizes, sets, full ingredient lists | 80 to 300 products, up to 4 variants each |
| Product information | Ingredient declaration, net quantity, warnings, as on the label | 100 % of product pages match the physical label |
| Regulatory | MoCRA facility registration and product listing, adverse event contact | Contact details for adverse event reports shown on site |
| Payments | Cards, Apple Pay, Google Pay, PayPal, buy now pay later | Checkout completes in under 60 seconds on mobile |
| Sales tax | Collection in every state where you meet economic nexus thresholds | Tax correct to the cent on 20 test addresses |
| Accessibility | WCAG 2.1 AA conformance | Zero critical issues in audit before launch |
| Performance | Mobile speed on 4G | Main content visible in under 2.5 seconds |
| Privacy | Consent and opt out for targeted advertising where state laws require it | Opt out link in the footer, honoured within 15 days |
| Maintenance | Updates, backups, response time | Payment outages fixed within 4 hours |
Accessibility deserves a line of its own: US retailers face a steady flow of website accessibility claims under the ADA, and cosmetics sites with image heavy product pages are frequent targets.
The budget, line by line
| Line | 2026 range in USD | What moves the price |
|---|---|---|
| Design and checkout journey | 5,000 to 20,000 USD | Custom design or adapted theme |
| Build and catalogue integration | 10,000 to 50,000 USD | Product count, sets, filters, subscriptions |
| Accessibility audit and fixes | 2,000 to 10,000 USD | Template complexity, number of page types |
| Sales tax and payments setup | 2,000 to 12,000 USD | Number of states, tax service integration |
| Shipping and Canada readiness | 2,000 to 10,000 USD | Carriers, duties, bilingual labels for Canada |
| Photography and product copy | 4,000 to 18,000 USD | Number of products to shoot |
| Total build | 25,000 to 120,000 USD | |
| Monthly maintenance and apps | 800 to 3,000 USD | Support level and response time |
For reference, Kolonell builds this type of store as a medium complexity web application at 2,500,000 to 4,000,000 FCFA (about 3,810 to 6,100 EUR) in 2 to 3 months with a remote team, with maintenance at 25,000, 50,000 or 75,000 FCFA a month (38, 76 or 115 EUR).
Acceptance criteria to write in
Acceptance is when you sign off delivery. Write numbered tests into the specification: 20 successful test orders per payment method, sales tax checked on 20 addresses in 10 states, accessibility audit with zero critical issues, mobile performance score above 80. Until these are met, the final payment, often 30 %, stays due but unpaid.
Mini case study
Illustrative example: Maya, founder of a Brooklyn argan cosmetics brand, expects 1,500 orders a month at a 55 USD basket, 82,500 USD in sales. By writing a 2.5 second load time and a one page checkout into her specification, she targets a conversion rate of 2.4 % instead of 1.8 % on the same traffic. That is 33 % more orders, about 27,000 USD of extra monthly sales, which at a 30 % net margin repays a 90,000 USD build in about 11 months, while the accessibility line protects her from claims that commonly cost 10,000 to 50,000 USD to settle.
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FAQ
How much does a cosmetics ecommerce store cost in New York?
Between 25,000 and 120,000 USD in 2026 for 80 to 300 products with tax, accessibility and compliance work. Maintenance and apps add 800 to 3,000 USD a month.
What FDA rules affect a cosmetics website?
Product pages should mirror label information, including the ingredient list and net quantity. Under MoCRA, brands must also register facilities, list products and handle adverse event reports, so build a contact path for them.
Do I need to collect sales tax in every state?
Only where you meet a state's economic nexus threshold, often 100,000 USD of annual sales into that state. A tax service connected to your store keeps rates accurate across thousands of jurisdictions.
Why is accessibility in the specification?
Because ADA website claims against retailers remain frequent, and fixing a live site costs more than building it right. Require WCAG 2.1 AA and an audit before launch, budgeting 2,000 to 10,000 USD.
How long does writing the specification take?
Plan 2 to 4 weeks internally, or 3 to 5 days with an outside consultant. It is the best investment in the project, avoiding 10 to 20 % budget overruns.
Let's scope your project. Send us your template, even partly filled in, and we will turn it into a costed quote with scope, indicative budget and launch date. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.