What are international patent costs?

Beyond the original priority filing, a PCT application costs $3,000-$5,000, and each country entered at national phase adds its own filing, translation, local attorney and renewal costs. Over a patent family's lifetime, protection across the key economies most companies prioritise (the US, Europe, the UK, China and Japan) commonly totals $50,000 to well over $100,000, and filing more broadly pushes well into six figures, which is why most companies protect their largest markets rather than filing everywhere.