In US pricing confirmed in a press release, Microsoft said that the ARM-based Surface RT will cost $499 for the 32GB version without a black Touch Cover, or $599 with a Touch Cover.
Microsoft is also offering a 64GB model of the tablet for $699 with a black Touch Cover included.
The Touch Cover can be bought separately for $119.99 in five different colours, and the Type Cover - which adds proper keys for a more traditional typing feel - costs $129.99. It only comes in black.
In the UK, the Surface will start from £399 for the base 32GB model, while the Touch Cover will cost £99.99 and the Type Cover £109.99. Microsoft has not yet announced UK pricing for the 64GB model.
The firm has said that a "special limited-quantity pre-order" of Surface will get under way at 9am PT (5pm UK time) today ahead of the October 26 launch, the same day that the Windows 8 software officially rolls out.
Built with a 10.6-inch screen, larger than the 9.7-inch display in the Apple iPad, the Surface tablet is 9.3mm thick and weighs just 1.5 pounds. It has a built-in kickstand and vapor-deposited (PVD) magnesium case.
The product, Microsoft's first major foray into hardware, will aim to attract tablet buyers away from Apple's iOS devices and slates running Google Android.
Microsoft has certainly priced the product pretty keenly. By contrast, Apple is currently offering the 32GB WiFi-only version of the new iPad that was launched in March for £479 on its website, £80 more than Microsoft's equivalent Surface device.
Surface will be available for purchase on October 26 from the Microsoft Online Store in the United States, Canada, Australia, Canada, China, France, Germany, Hong Kong and the United Kingdom.
Microsoft's Surface Pro, an alternate tablet product built with an Intel CPU and running the Windows 8 Pro operating system, will go on sale within three months of the Surface RT launch.