The costs of war and damage done since Friday will hit both Israel and Iran. One is already in the midst of an expensive war, the other battered by years of sanctions.

As Israel and Iran carry out strikes against each other for a seventh straight day, the region is anxiously bracing for a potentially wider conflict. But question marks remain over the two sides’ ability to finance a sustained war effort.

On Friday, Israel killed several of Iran’s top military commanders and nuclear scientists and damaged some of its nuclear sites. It has since damaged parts of Iran’s fossil fuel sector. In response, Iran has launched missile attacks at government buildings and metropolitan areas in Israel.

As of Thursday, the Israeli attacks have killed 240 people while Iranian strikes have killed at least 24 people.

But the conflict is also costing both nations billions of dollars and could choke their economic growth and trigger concerns over long-term fiscal planning.