Can I add my own markup or service fee to the prices my customers see on my white label portal?

Yes, you can add your own markup or service fee on top of the prices your customers see on your white label portal. The supplier price comes in as the starting point, and whatever margin you set sits on top of it, so the person booking sees one final price rather than your cost and your fee side by side. If you would rather show the fee openly as a separate service charge, that is usually possible too.

Most setups let you decide how the margin works. You can apply a fixed amount on each booking, or a share of the fare, and you can normally set different rules for flights, hotels and other products, since the margin you work on is rarely the same across them. If other agents book through your portal, you can usually give them their own margin as well, so they earn something while you still keep yours.

There are limits worth being honest about. Some suppliers and some fare types do not allow the displayed fare to be altered, and in those cases your fee has to sit as a separate charge instead of inside the fare. Taxes and supplier charges are not yours to change and stay exactly as the supplier sends them. How much control you get also depends on the plan you are on and on the contracts behind each supplier connection.

Before you start selling, decide your markup rules product by product and run a few test searches, so you can check that the final price your customer sees is the one you expected.