Jan 2 (Reuters) - Rivian Automotive posted a sequential fall in fourth-quarter deliveries on Tuesday, and missed market estimates, as tough competition and high interest rates affect demand for its electric vehicles.

The company delivered 13,972 vehicles in the quarter to Dec. 31, 10% lower than the previous three months and below estimates of 14,430, according to 13 analysts polled by Visible Alpha.

High interest rates have raised monthly payments for electric vehicles, making them less affordable. The Rivian R1T pickup truck, which starts at $73,000, also faces competition from Tesla's Cybertruck, which was unveiled in late November.

(Reporting by Zaheer Kachwala in Bengaluru; Editing by Krishna Chandra Eluri)