Ask a parent who didn't come back and you'll hear one of three sentences. Not one of them is about your teaching.
"We weren't sure it was making a difference."
This one stings, because you know it was. You saw the change in the room. The parent didn't, because the parent wasn't in the room, and nothing came out of the room that they could look at.
A parent judges tutoring the way anyone judges something they pay for and can't see: by whatever evidence turns up. For most centres that's a school report they didn't write, a child who says "fine" when asked, and an invoice. Against that, "not sure" is the honest answer.
"She was doing the work but we never heard anything."
Work went home, came back, got marked, went into a bag. Somewhere in that loop was information the parent would have paid to see: what she got wrong, what she got right, what changed since March. Nobody told them, because nobody had a reason to, because the marking was done at 10pm and the record was a tick on a sheet.
This parent isn't unhappy. They're uninformed, and an uninformed parent renews on habit until the habit breaks.
"It just lapsed over the holidays."
Six weeks with no contact. The routine goes, the child stops thinking about it, and by late January the parent has found a reason not to restart. Not a decision so much as a drift.
What the three have in common
Every one of them is about what the parent could see between sessions. Which is nothing. Ninety minutes a week in the room, and six days of silence.
The fix isn't better teaching. It's proof: short, regular, specific, in writing, from you. A parent who has seen twenty short reports across a year, each one naming a skill that improved, walks into Term 4 with a reason. A parent who has seen invoices walks in with a question.
What to do this week
Write to every parent, one page, about what improved this term. Name the skill. Sign it. Send it before the re-enrolment form, not with it. The parent report template has the layout and a filled example, and the Term 4 retention playbook has the rest of the calendar.
If you'd rather the report wrote itself from the work your students actually did, from your own material, that's what the fortnightly report on StudyPro is. Same idea. No Sunday night.