Why can a real business purchase in Korea still fail as a VAT credit if the invoice trail is wrong?

Question

Business owners in Korea often assume that once an expense is genuinely for the business, input VAT should obviously come back. Please explain why the tax invoice is doing so much of the legal work, and why VAT credit questions in Korea are often documentation fights before they are economic fights.

TaxGuided · Accepted Answer

Owners tend to think economically first: if the business genuinely bought something for business use, why should the credit be controversial? Korean VAT law is stricter than that instinct. Input tax recovery depends not just on business purpose, but on whether the taxpayer holds the proper tax invoice and satisfies the documentary conditions the system expects. That is why a perfectly real purchase can still produce a disappointing VAT outcome.

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Why can a real business purchase in Korea still fail as a VAT credit if the invoice trail is wrong?

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