Does the Portfolio Optimiser Take Into Account Transaction Costs and Taxes?

No, the Portfolio Optimizer does not take into account transaction/commission costs and taxes. This is because there is no standardization in costs and tax formats. Therefore, investors should consider the applicability of Portfolio Optimiser’s results for creating or rebalancing a portfolio based on their commission and tax structures.

Useful Links:
Portfolio Optimiser US
How to Use Portfolio Optimiser (YouTube)