The manufacturing sector consists of handicrafts and a few other very small-scale industries, all of which contribute only about 3% of GDP. Commercial business activities also are inconspicuous and, to a large extent, are dominated by the same large trading companies found throughout the South Pacific. In September 1974, the country's first commercial trading bank, the Bank of Tonga, opened.

Rural Tongans rely on plantation and subsistence agriculture. Coconuts, vanilla beans, and bananas are the major cash crops. The processing of coconuts into copra and desiccated coconut is the only significant industry. Pigs and poultry are the major types of livestock. Horses are kept for draft purposes, primarily by farmers working their api. More cattle are being raised, and beef imports are declining.

Tonga's development plans emphasize a growing private sector, upgrading agricultural productivity, revitalizing the squash and vanilla bean industries, developing tourism, and improving the island's communications and transportation systems. Substantial progress has been made, but much work remains to be done. A small but growing construction sector is developing in response to the inflow of aid monies and remittances from Tongans abroad. The copra industry is plagued by world prices that have been depressed for years.

Efforts are being made to discover ways to diversify. One hope is seen in fisheries; tests have shown that sufficient skipjack tuna pass through Tongan waters to support a fishing industry. Another potential development activity is exploitation of forests, which cover 35% of the kingdom's land area but are decreasing as land is cleared. Coconut trees past their prime bearing years also provide a potential source of lumber.

The tourist industry is relatively undeveloped; however, the government recognizes that tourism can play a major role in economic development, and efforts are being made to increase this source of revenue. Cruise ships often stop in Nuku'alofa and Vava'u.