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<p>Well, I’m not sure there is such a thing as a medical device manufacturer that makes 100% of its revenues on sales of medical devices, but leaving that aside, I think there’s still a technical difference between a tax on sales and a tax on revenues. With an ad valorem sales tax (or ad valorem excise tax on the sale), the seller sets a sale price and the tax is calculated on the basis of that price. So if the medical device costs $1,000 and the sales tax is 2.3%, the tax is $23. The seller will typically try to recoup that $23 by invoicing the tax to the purchaser–$1,000 for the device, $23 for the sales tax, total $1,023. Revenue to the seller is $1,000. Revenue to the government is $23. Cost to purchaser is $1,023.</p>
<p>With a gross revenue tax, what’s taxed is the seller’s revenue, not the sale price of the item sold. So if the seller sells a device for $1,000, the seller’s revenue is $1,000, and the revenue tax is $23. But a revenue tax can’t be separately invoiced to the buyer because it’s not a tax on the sale, it’s a tax on the seller’s revenue. So the $23 comes out of the seller’s $1,000 in revenue; the seller is left with $977 in net revenue, and the government gets its $23. Cost to the purchaser remains at $1,000. Of course, the seller could try to recoup the $23 by raising the price to $1,023. But then its gross revenue is $1,023, and the 2.3% revenue tax on that is $23.53, so the seller’s net revenue is $999.47 ($1,023 - $23.53). Seller could try to recoup that lost $.53 by raising the price to $1,023.53, but then its revenue is $1,023.53, and the 2.3% tax on that is $23.54. So seller is still out a penny, and the cost to the purchaser is $1,023.54. Seller would need to raise the price to $1,023.54 to net out $1,000 in revenue after rounding. It’s a small difference at this price point, but multiply that by thousands of sales, some of them involving much more expensive devices, and it adds up.</p>
<p>The difference between a sales tax and a revenue tax is the taxable “event.” On a sales tax, the taxable event is the sale. On a revenue tax, the taxable event is revenue accruing to the seller (or investor, or whatever). There is a difference, albeit a technical one.</p>