It also said Tehran was ready to answer key questions on past suspicious experiments that the international community fears could be linked to a weapons program.
The IAEA — the UN nuclear monitor — said Iran promised the concessions earlier this week in meeting between its officials and a senior delegation from the Vienna-based agency.
In June, Iran and the agency agreed to draw up an "action plan" on how to resolve questions about the country's disputed nuclear program. Western powers suspect that its nuclear program is a front to obtain nuclear arms. Tehran says it wants nuclear technology only to generate power.
IAEA deputy director Olli Heinonen met Javad Vaeedi, Iran's deputy nuclear negotiator, and Mohammad Saeedi, deputy head of Iran's Atomic Energy Organisation, on Wednesday and Thursday in the Iranian capital to discuss the plan.
The IAEA said it would meet Iran representatives in Vienna in July to finalize the work plan on outstanding issues. Another meeting dedicated to Iran's past plutonium experiments would be held in Iran in early August, the agency added.
AP and Reuters contributed to the report