Strategic Petroleum Reserve levels stood at roughly 402 million barrels as of late April 2026, about 56% of the reserve’s 714-million-barrel authorized storage capacity.1Department of Energy. SPR Quick Facts That is well below the 2009 peak of nearly 727 million barrels, and the gap is explained by three things: the historic 2022 emergency release, a run of congressionally mandated sales, and a March 2026 international commitment that could push inventory sharply lower over the coming months.
What the 402 Million Barrels Actually Contains
The reserve holds two grades of crude. As of April 29, 2026, about 150 million barrels were sweet crude, which has lower sulfur and is easier for most refineries to process into gasoline, and roughly 252 million barrels were sour crude, which has higher sulfur and requires more intensive refining.1Department of Energy. SPR Quick Facts The Department of Energy tracks that ratio because Gulf Coast refineries each need a specific grade, and every sale is published with chemical assay data so buyers know what they are bidding on.
At the close of calendar year 2025, inventory sat at about 411 million barrels.1Department of Energy. SPR Quick Facts The drop to 402 million by late April reflects ongoing activity, though the full effect of the March 2026 international commitment had not yet appeared in the numbers.
Why the Reserve Is Roughly Half Full
The single biggest reason traces back to 2022. In response to global supply disruptions after Russia’s invasion of Ukraine, the federal government released approximately 180 million barrels, the largest drawdown in SPR history. That release pulled the stockpile from about 568 million barrels down to under 350 million in roughly six months.
Congressionally mandated sales pushed the number lower still. Budget acts passed between 2015 and 2018 directed the DOE to sell hundreds of millions of barrels over a multi-year schedule, not to address any supply emergency but to raise revenue for other federal programs. A 2018 EIA analysis identified the Bipartisan Budget Act of 2018 alone as requiring 35 million barrels in sales during fiscal year 2026, with the Tax Cuts and Jobs Act adding another 7 million barrels across fiscal years 2026 and 2027.2U.S. Energy Information Administration. Recent Legislation Mandates Additional Sales of U.S. Strategic Petroleum Reserve Crude Oil The DOE did work with Congress to cancel roughly 140 million barrels in mandated sales scheduled between fiscal years 2024 and 2026, which kept inventory from falling further than it has.3Department of Energy. Biden-Harris Administration Makes Final Purchase for the Strategic Petroleum Reserve
The March 2026 International Commitment
On March 19, 2026, the International Energy Agency confirmed a collective action in which member countries committed to making roughly 426 million barrels of oil available to the global market in response to Middle East supply disruptions. The United States pledged the largest individual contribution at 172.2 million barrels, all from public stocks of crude oil.4IEA. IEA Confirms Member Country Contributions to Collective Action to Release Oil Stocks in Response to Middle East Disruptions
If executed in full, that commitment alone would take the SPR below 250 million barrels, the lowest level since the early 1980s. The IEA has noted the split between crude and refined products can still shift as countries finalize their contributions.4IEA. IEA Confirms Member Country Contributions to Collective Action to Release Oil Stocks in Response to Middle East Disruptions The April 2026 inventory of 402 million barrels suggests the drawdown is either in its early stages or being phased over time. Either way, it would be the most significant release since 2022.
The 252.4 Million-Barrel Floor
Current levels matter for a legal reason that becomes concrete if the IEA commitment is carried out. The Energy Policy and Conservation Act gives the President several drawdown authorities, but the “limited drawdown” authority, used for supply shortages that fall short of a full emergency, is capped at 30 million barrels over no more than 60 days. The statute also bars the DOE from using that authority at all if the reserve holds fewer than 252.4 million barrels, and it cannot draw inventory below that floor.5Office of the Law Revision Counsel. 42 USC 6241 – Drawdown and Sale of Petroleum Products
At 402 million barrels, that floor is a distant guardrail. If the March 2026 release is delivered in full, it becomes a binding constraint, effectively taking the limited-drawdown tool offline until the reserve is replenished. Full emergency drawdowns, which require a presidential finding of a severe supply interruption threatening the national economy, have no statutory barrel cap and remain available regardless.
The United States also carries an international obligation on top of the domestic floor. As an IEA member, it must maintain emergency oil stocks equal to at least 90 days of net oil imports, met through some combination of government stockpiles and industry stocks.6IEA. Oil Security and Emergency Response
How the Reserve Gets Refilled
Refilling is slower than draining. The DOE uses the SPR Petroleum Account to buy crude on the open market, typically aiming for prices below what the government received during earlier sales. After the 2022 release sold oil at an average around $96 per barrel, the DOE repurchased crude at roughly $74 per barrel, locking in a meaningful discount.3Department of Energy. Biden-Harris Administration Makes Final Purchase for the Strategic Petroleum Reserve Those purchases lifted inventory from its 2023 low back toward the 400-million-barrel range.
Exchange agreements offer a second path. The DOE lends crude to a refinery facing a temporary local shortage, and the borrower returns the original volume plus additional “premium barrels” as a form of interest. One recent exchange involved 26 million barrels with premium barrels due back the following year, growing the stockpile at no direct cost to taxpayers.7Department of Energy. Energy Department Awards New Contracts from Strategic Petroleum Reserve The DOE also negotiates long-term fixed-price purchase contracts when market conditions are favorable.
Physical constraints slow the process too. All SPR crude sits in underground salt caverns at four Gulf Coast facilities in Texas and Louisiana, and rapid withdrawals cause the salt walls to deform inward under geological pressure, permanently shrinking cavern volume. The 2022 drawdown was fast enough to cause structural damage at some facilities, reportedly requiring more than $100 million in repairs, with work still ongoing as of mid-2025. That is part of why authorized capacity of 714 million barrels and practical operating capacity are not the same number, and why rebuilding levels after a large release is a multi-year effort rather than a matter of months.