This paper discusses the reporting of radiocarbon (¹⁴C) data, emphasizing the need for standardized procedures to ensure consistency and accuracy in inter-laboratory comparisons. It outlines the key steps and parameters that should be included in the reporting of ¹⁴C data, including the use of the NBS oxalic acid standard, isotopic fractionation corrections, and the calculation of conventional radiocarbon ages. The paper also addresses the importance of reservoir corrections, the statistical uncertainty of age determinations, and the definition of percent modern. It recommends that for chronological studies, the ¹⁴C age should be reported with its standard error, along with the δ¹³C ratio and any reservoir correction. For geochemical studies, additional parameters such as δ¹⁴C and Δ¹⁴C are recommended. The paper also discusses the calculation of ¹⁴C ages and the necessary corrections for age differences between sample and measurement years. It emphasizes the importance of clearly defining the meaning of each term used in radiocarbon data reporting to avoid ambiguity. The paper concludes with recommendations for the reporting of ages close to modern or background levels, and the rounding of ¹⁴C ages based on the magnitude of the standard error. The authors stress the importance of following these guidelines to ensure the reliability and comparability of radiocarbon data across different laboratories and studies.This paper discusses the reporting of radiocarbon (¹⁴C) data, emphasizing the need for standardized procedures to ensure consistency and accuracy in inter-laboratory comparisons. It outlines the key steps and parameters that should be included in the reporting of ¹⁴C data, including the use of the NBS oxalic acid standard, isotopic fractionation corrections, and the calculation of conventional radiocarbon ages. The paper also addresses the importance of reservoir corrections, the statistical uncertainty of age determinations, and the definition of percent modern. It recommends that for chronological studies, the ¹⁴C age should be reported with its standard error, along with the δ¹³C ratio and any reservoir correction. For geochemical studies, additional parameters such as δ¹⁴C and Δ¹⁴C are recommended. The paper also discusses the calculation of ¹⁴C ages and the necessary corrections for age differences between sample and measurement years. It emphasizes the importance of clearly defining the meaning of each term used in radiocarbon data reporting to avoid ambiguity. The paper concludes with recommendations for the reporting of ages close to modern or background levels, and the rounding of ¹⁴C ages based on the magnitude of the standard error. The authors stress the importance of following these guidelines to ensure the reliability and comparability of radiocarbon data across different laboratories and studies.