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# How does the projection on the Tomorrow screen work?

The goal of the simulation is to estimate the size of your savings on Curvo by the time you reach the retirement age in Belgium, which is 67.

The projection starts by calculating the expected average yearly return of your portfolio. For instance, for the Growth portfolio, the asset classes are expected to return 7.3% per year, and the total cost of ownership of the funds is 0.27%. So the expected yearly return of the Growth portfolio is 7.03%.

Then it steps in the future, month by month. It starts from your current savings on Curvo. Each month, it adds your monthly contribution and calculates the expected monthly return based on the return of your portfolio and the fee, taking into account the [tiered pricing](https://curvo.eu/pricing). This process continues until it reaches your 67th birthday!