Driver Gemma Cousin, 26, husband Rhys, 25, and their two young daughters Peyton, three, and Heidi, one, were killed in a car crash on Thursday, February 20.
The four family members died at the scene when their Mini Cooper collided with a Ford Fiesta.
Relatives have set up a fundraising page since the accident to raise money for the Inverness family’s funeral which is set to take place this Thursday.
The gofundme page, which initially had a target of £15,000, has now reached £21,710.
Money will also be donated to road safety charity Brake.
A post from Nikki Cartwright on the fundraising page read: “On the 20th of February 2020, our family had sadly lost Rhys, Gemma, Peyton and Heidi. A whole young family has been taken away from us.
“They were all kind and happy individuals who were loved by everyone who met them and will be sorely missed.
“A tragic accident has taken them all away from us and now all that’s left is memories and photos which will be cherished forever.
“Nothing will fill the hole left in our hearts we are all absolutely devastated and struggling to come to terms with it.
“To ease the burden of costs for a funeral for our Rhys, Gemma, Peyton and Heidi we have set up this page.”
After the accident Rhys’s mother Samantha said: “There are no words to describe the pain that we are dealing with in this moment of time.
“We are overwhelmed and will be forever grateful for all the support and generosity from family, friends and complete strangers.
“It doesn't seem enough to just say thank you from the bottom of our hearts but that’s all we have.”
The funeral is due to take place on Thursday in Inverness.