Lukaku is already his country's leading all-time scorer with 40 international goals at the age of just 25, surpassing a record which had stood for 78 years earlier this summer.
However, the striker has now outlined his plans to step aside and allow younger players to come through on the international stage following the next major tournament in two years' time.
"After the Euros, I think I'll stop. I'm 25, I'm like, I'm not even in my prime yet," Lukaku told Business Insider.
"So I still see them as competition right now because they try to take my spot and I don't want to give it up to them. So like another two years, and then they can have it."
Lukaku has scored his 40 goals in just 75 appearances for Belgium.