The new measure will require all foreign-registered vehicles to be declared before crossing South Africa's borders.
According to Sars, the move aligns the country with international customs practices and forms part of broader efforts to modernise customs operations at ports of entry.
Sars Commissioner Dr Johnstone Makhubu said the system would support improved border management and traveller processing.
"It delivers clear benefits which include enabling better risk-based screening, strengthening coordination with other authorities and improving the overall traveller experience. It also supports South Africa's financial transparency obligations and enhances national security by ensuring goods, currency and vehicles are properly declared and assessed before entry or exit."
Foreign vehicles that are temporarily imported into South Africa may still be issued with temporary import permits valid for six months.
These permits can be used for multiple border crossings during their validity period without requiring travellers to reapply each time they enter the country.
Sars said frequent travel for work, study, business, medical care or other lawful purposes will not affect permit validity, provided permits remain current and are renewed when required.
Sars is encouraging travellers to complete declarations online before arriving at the border to benefit from faster processing.
The revenue service said officials will be available at ports of entry to assist travellers who are unable to complete the process electronically.
However, online declarations will not replace existing customs procedures, and travellers will still be required to present themselves for verification and inspection where necessary.
Makhubu warned that travellers who fail to comply could face enforcement action and delays at border crossings.
“Compliance is not optional; vehicle owners who do not declare foreign-registered vehicles or who provide false or incomplete information expose themselves to enforcement consequences and prolonged processing at the border. I also wish to reaffirm that where vehicle owners comply with all the legal requirements, the process will be seamless; however, where compliance is low, this may lead to delays in border crossings.”
Sars has encouraged foreign vehicle owners and cross-border operators to familiarise themselves with the new declaration requirements and make use of official guidance when crossing South Africa's borders.
