How do you derive the implied perpetuity growth rate from an exit-multiple terminal value, and why is it a useful check?
A core Valuation interview question — asked in analyst and associate interviews across IB, PE, and the Big 4.
THE SHORT ANSWER
If you set terminal value with an exit multiple, you should back out the perpetuity growth rate it implies and sanity-check it. Rearrange the Gordon formula: with TV = exit multiple × terminal metric, and TV = FCF·(1+g)/(WACC−g), solve for g given your WACC and terminal FCF. If the implied g comes out at, say, 5–6% for a mature business, the exit multiple is too aggressive (no mature firm grows above long-run GDP forever); if it implies negative growth, the multiple may be too low. Conversely, when you use Gordon growth, compute the implied exit multiple and compare to current trading multiples. The cross-check matters because the two terminal methods should tell a consistent story — a large gap reveals an internally inconsistent assumption, and since terminal value dominates the DCF, it's where a sanity check earns its keep.
WHAT INTERVIEWERS LISTEN FOR
- ✓Back out g from TV = FCF(1+g)/(WACC−g) given the exit-multiple TV
- ✓Implied g above long-run GDP signals too-aggressive multiple
- ✓Reverse-check: implied exit multiple from a Gordon TV vs trading multiples
- ✓Terminal value dominates, so consistency check is high-value
COMMON MISTAKES
- ✗Never cross-checking the two terminal methods
- ✗Accepting an implied g above GDP
- ✗Treating exit multiple and Gordon as unrelated
Reading isn't the same as answering under pressure.
Interviewers don't hand you the model answer — you deliver yours on a clock. Practice this and 1,000+ questions with AI feedback on every answer.
RELATED QUESTIONS
- What happens to the DCF value if you increase WACC by 1%?
- How do you calculate Beta for a private company?
- Should you use mid-year or year-end convention in a DCF?
- How do you handle negative cash flows in a DCF?
- What discount rate would you use for a highly leveraged company?
- A company has negative working capital because it collects cash from customers upfront but pays suppliers later. How does this affect your DCF valuation, and what trap must you avoid when projecting free cash flows?