We expect the cost of servicing the federal debt to amount to about 8% or 8.2% of federal revenues. That's significantly lower than the peak reached in the mid-1990s where it was 35%, 36%, if not slightly higher. It's still relatively low compared to the peak that was reached 25 years ago, but that's due to the very low level of interest rates. Interest rates being so low means they can either stay very low or they can start to increase progressively over time. Even though it's a very small proportion of federal revenues, that share is likely to increase over the next several years.
On May 29th, 2020. See this statement in context.