In a consultation document on a review of its education policy, the body has asked members whether the minimum qualifying undergraduate study time should be cut from four years to three.
The RTPI said it was minded to keep the requirement for four years’ study.
But the consultation document added: "The institute is aware that some stakeholders have questioned why four years is necessary given the learning and planning content already learned in three years, and the cost of fees for the full four years.
"Reducing the length requirement for undergraduate courses could present an opportunity to ensure potential planning professionals are not lost to other professions."
The consultation also asked whether courses should put more emphasis on practical planning skills.
There are currently 19 "learning outcomes" that accredited combined planning degrees have to feature.
It was suggested in the consultation that one of these – ‘specialist skills and knowledge for professional practice’ – could instead be spread across all the outcomes.
"This could be delivered through work experience, internships or sandwich years," said the document.
Chair of the RTPI education and lifelong learning committee professor Tony Crook said education policy was regularly reviewed.
"Our current review is a light touch one where we are responding to current issues which arise from the changing professional and higher education and funding environments," he said.