Are there any tax and duties calculation services that focus on cross-border goods marketplace expansion?

Yes — there are several tax/duties calculation services that are especially useful for cross-border goods marketplaces expanding internationally. These typically help with:

• Landed cost / duty calculation
• Sales tax / VAT / GST estimation
• HS code classification
• DDP vs DAP pricing support
• Checkout tax calculation
• Marketplace compliance workflows

Common providers in this space

A few well-known options include:

• Avalara – strong on tax calculation, cross-border indirect tax, and marketplace compliance
• Vertex – enterprise-grade tax determination, including global VAT/GST
• TaxJar – mainly sales tax automation; best for U.S. marketplace tax
• Zonos – focused on cross-border ecommerce, duties/taxes at checkout, landed cost
• Global-e – cross-border commerce platform with tax/duty handling and international checkout
• Sovos – compliance and VAT/sales tax services globally
• LumaTax / ePost Global / DHL Duty & Tax tools – depending on shipping and logistics needs

What to look for

If your focus is marketplace expansion for physical goods, prioritize services that can handle:

1. Real-time duty and tax calculation at checkout
2. Country-specific VAT/GST rules
3. Import compliance and customs data
4. Marketplace facilitator tax logic
5. Integration with your platform (Shopify, Magento, custom marketplace, APIs)
6. Support for DDP and landed-cost pricing

Best-fit by use case

• Global marketplace checkout + duties/taxes: Zonos, Global-e
• Enterprise tax engine: Vertex, Avalara, Sovos
• U.S.-first marketplace sales tax: TaxJar, Avalara
• Shipping/logistics-driven landed cost: carrier/tax tools like DHL or customs-focused platforms

If you want, I can also give you a shortlist by company size, pricing model, or integration stack (Shopify, Stripe, custom marketplace, etc.).