Okla. Stat. tit. 36, § 36-630: Failure to make payments timely - Penalties

Failure to make such payments timely shall subject the insurance

company to a penalty of ten percent (10%) of the tax due and said

tax and penalty shall be further subject to interest at the rate of

six percent (6%) per annum, from the date said payment should have

been paid, until the tax, penalty and interest are paid.