The World Group II play-offs were four ties which involved the losing nations of the World Group II and four nations from the three Zonal Group I competitions. Nations that won their play-off ties entered the 2018 World Group II, while losing nations joined their respective zonal groups.

Participating Teams
Australia	Canada	Chinese Taipei	Great Britain
Italy	Kazakhstan	Romania	Serbia

Italy 3	Circolo Tennis Barletta, Barletta, Italy[1] 22–23 April 2017 Clay		Chinese Taipei 1
1 2 3 1 Martina Trevisan Lee Ya-hsuan 2 6 6 3 12 10   2 Sara Errani Hsu Chieh-yu 6 0 6 2     3 Sara Errani Lee Ya-hsuan 3 6 6 2 6 3   4 Martina Trevisan Hsu Chieh-yu       not played 5 Jasmine Paolini / Camilla Rosatello Chuang Chia-jung / Hsu Ching-wen 4 6 4 6

Romania 3	Tenis Club IDU, Constanța, Romania[2] 22–23 April 2017 Clay		Great Britain 2
1 2 3 1 Simona Halep Heather Watson 6 4 6 1     2 Sorana Cîrstea Johanna Konta 2 6 3 6     3 Simona Halep Johanna Konta 6 1 6 3     4 Irina-Camelia Begu Heather Watson 6 4 7 5     5 Simona Halep / Monica Niculescu Jocelyn Rae / Laura Robson 3 6 6 1 [8] [10]

Serbia 0	Kristalna Dvorana Sports Hall, Zrenjanin, Serbia[3] 22–23 April 2017 Hard (indoors)		Australia 4
1 2 3 1 Aleksandra Krunić Ashleigh Barty 4 6 3 6     2 Ivana Jorović Daria Gavrilova 2 6 2 6     3 Nina Stojanović Daria Gavrilova 0 6 3 6     4 Ivana Jorović Ashleigh Barty       not played 5 Ivana Jorović / Nina Stojanović Ashleigh Barty / Casey Dellacqua 1 6 5 7

Canada 3	Uniprix Stadium, Montreal, Canada[4] 22–23 April 2017 Hard (indoor)		Kazakhstan 2
1 2 3 1 Bianca Andreescu Yulia Putintseva 4 6 6 4 4 6   2 Françoise Abanda Yaroslava Shvedova 6 3 6 4     3 Françoise Abanda Yulia Putintseva 6 3 6 3     4 Bianca Andreescu Yaroslava Shvedova 77 61 6 4     5 Gabriela Dabrowski / Katherine Sebov Kamila Kerimbayeva / Galina Voskoboeva 78 66 66 78 [5] [10]