Last Collection Deleted!

[Anonymous]

Long story short I am trying to rebuild my credit to go on a home loan with my husband. My middle mortgage score in February was 599 with two collections and 92 percent utilization. I paid my chase credit card down to 30 utilization and they balance chased me a day before reporting so it brought me back up to 80. It's now at 50 but will be at 20 by the end of April. I got one collections removed which boosted my middle score to 637! Qualifying at least. My other collection reported at settled for less but it was only 80 dollars so they didn't explain well because I wanted it to say paid in full. Well I called and called and finally got someone to agree to deleted within 10 business days! 
with my utilization lowered and the last collection deleted how much should I expect my score to boost? 

[gdale6]

If there are no other derogs present the increase in Fico could be substantial depending on your overall profile. Since the collection was for less than 100 it wasnt being factored into any Fico scores in models 8, 9 or 10

[Anonymous]

How old were they? That may matter since many derogs lose impact over time. My final derog came due to fall off this month. It was paid in full a year and a half ago and aged to five years. It fell off EQ yesterday, resulting in a 44 point gain on FICO8. Fell off TU today, waiting to see the gain, and is still waiting to fall from EX. I don't know my mortgage score gains but the F08 gains are substantial - I'd think you'd be seeing somewhere from 40-60 points per bureau depending on the other scoring factors in play on your profile.