The deal, which includes opening and closing credits and break bumpers, is part of the credit card's "Long Live Dreams" campaign, which encourages people to use their American Express card to live their dreams.
The deal was negotiated by Carat sponsorship manager Ryan Sandilands and follows a joint sponsorship deal, as part of the same campaign, with The Daily Telegraph and Classic FM in May.
Catherine Whitton, director of brand and communication at American Express, said the programme fitted well with the campaign's concept.
"'No Going Back: A Year in Tuscany' sits perfectly within our extensive sponsorship campaign for 'Long Live Dreams', which already includes highly successful press and radio activity with Classic FM and The Daily Telegraph," she said.
The series begins tonight with an hour-long special. It revisits a family, who in the second series swapped their life in Leeds for a 15-acre olive farm in Tuscany. They plan to become self-sufficient, make their own olive oil and convert their barn into holiday accommodation.
American Express's "Long Live Dreams" campaign, created by Ogilvy Worldwide, broke in November across TV, outdoor, cinema, interactive and direct mail.
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