The main difference between VAT and sales tax is that VAT is paid by each stage in the supply chain (every time someone "adds value"), and reclaimed by charging

The main difference between VAT and sales tax is that VAT is paid by each stage in the supply chain (every time someone "adds value"), and reclaimed by charging it to the next stage up in the chain. Sales tax is charged only once, at the final point of sale to the consumer. The end effect is the same: the consumer ends up paying whatever % the tax is. The difference is in how it's collected. Sales tax is easier to evade because business-to-business sales usually don't charge sales tax. So you could wink at your customer and say they're a business and not charge them sales tax. With VAT everyone is supposed to pay it, so it's harder to evade (and consequently more expensive for governments to collect).