Base model prices including destination charges without gas savings discounted.
Tesla Model 3 - $31450 right now after CA + Fed rebate
Tesla Model Y - $48200 likely no rebate available at release
Tesla Model Y premium over 3 = $16,750
Keep in mind the Model Y also includes the premium interior features which cost an additional $3500 to get by upgrading to the Model 3 mid range, bringing the premium over the 3 to $13,250. The Model Y also gets 80 miles of additional range over the base Model 3.
The base Model Y (RWD long range) is comparable in features and performance to the RWD long range Model 3. When you compare those two, it's only a 4K price differential (47K vs 43K). It's a bit misleading to say the Model Y has a 13K premium over the 3; that's only true if you compare two cars with drastically different feature packages.
You're forgetting the tax credits on the Model 3, which probably won't exist when the Model Y is released. This is also an important factor for the future because the price of the Model 3 will likely be lowered as the credits expire.
It is misleading because it is a very specific case in California/US. For people in other countries these things don't apply. We have 10k euro discount to Electric cars for instance. It would apply to both cars equally.
It also doesn’t include any of the autopilot features. Add $3,000 for the basics, $8,000 for full. And $4,000 for AWD. Oh, and $1,500 if you want anything but black. (All the same prices for the 3, but still something to consider.)
Tesla Model 3 - $31450 right now after CA + Fed rebate
Tesla Model Y - $48200 likely no rebate available at release
Tesla Model Y premium over 3 = $16,750
Keep in mind the Model Y also includes the premium interior features which cost an additional $3500 to get by upgrading to the Model 3 mid range, bringing the premium over the 3 to $13,250. The Model Y also gets 80 miles of additional range over the base Model 3.