| Subject | Russian | English |
| econ. | выплаты в счёт недоплаченных ранее сумм | backpayment |
| gen. | недоплатить пять рублей | underpay by five rubles |
| Makarov. | недоплатить кому-либо тысячу рублей | underpay someone by a thousand roubles |
| econ. | недоплаченная сумма | amount owing |
| law | недоплаченная сумма | amount owed (Elina Semykina) |
| gen. | недоплаченная сумма | arrears (money that is owed and should already have been paid: "He ran into difficulties with his mortgage, building up more than £18,000 arrears. "The government is committed to the full and timely payment of its public debt and arrears. CBED Alexander Demidov) |