Overview
The Bank of Japan reported a drop in net income for fiscal 2025 as higher short-term interest rates increased the interest paid on excess reserves that financial institutions hold at the central bank. The data show a notable shift in the BOJ's earnings profile as monetary policy moves away from the exceptional stimulus of recent years.
Policy moves and reserve payouts
After exiting an extended, large-scale stimulus programme in 2024, the BOJ has raised its short-term policy rate several times, including a move in December that lifted the rate to 0.75% from 0.5%. Under a programme intended to keep money market rates close to the policy rate, the BOJ now pays 0.75% interest on excess reserves parked with the central bank.
The rise in the policy rate led to substantially higher interest costs for the BOJ. In the fiscal year that ended in March, the central bank paid 2.7 trillion yen in interest on reserves, up from 1.3 trillion yen the previous fiscal year. That payout exceeded the 2.5 trillion yen of interest income the BOJ recorded from its government bond holdings during the same period.
Financial results and balance sheet adjustments
For fiscal 2025, the BOJ's net income fell to 1.9 trillion yen from 2.3 trillion yen in the prior year, reflecting the higher cost of the interest paid on banks' excess reserves. The data mark the first time the central bank's interest payments on reserves have overtaken interest earned from its holdings of government bonds, a development the BOJ's figures describe as underscoring the cost associated with normalising monetary policy.
Alongside interest rate increases, the BOJ has been slowing its purchases of government bonds to reduce the size of its balance sheet. Partly as a result of shrinking government bond holdings, the BOJ's total asset balance declined 9.1% at the end of fiscal 2025 compared with a year earlier. Japan's fiscal year runs from April to March of the following calendar year.
Context for financial institutions and markets
The data highlight how adjustments in central bank policy - specifically higher short-term policy rates and reduced bond purchases - change the composition of central bank earnings and liabilities. Financial institutions that park excess reserves at the BOJ receive higher remuneration tied to the policy rate under the programme designed to align money market rates with the BOJ's policy stance.
Currency disclosure in the data set lists an exchange reference of $1 = 159.3200 yen.
Bottom line
The BOJ's fiscal 2025 results reflect the immediate fiscal impact of policy normalisation: higher interest payments on reserves and a smaller balance sheet have combined to reduce the central bank's net income even as it shifts away from the extraordinary stimulus framework implemented in prior years.