Decide the policy before the first regular asks

Grandfathering is a policy question that people answer emotionally, usually at the worst moment: a regular has just booked at the new price and is asking why it went up. Decide it in advance, write it in one sentence, and apply it to everybody the same way.

The defensible answer for most earners is a time limit rather than a permanent hold - old price honoured for a stated window, then everyone on the same card.

Why permanent grandfathering goes wrong

It sounds generous and it compounds badly.

Every rise from then on applies to a shrinking share of your buyers, so each one does less work and your average take-home drifts below your listed price. After a couple of years the people who book you most often are paying least, which is the inversion of what a repeat relationship should produce.

It is also administratively awful: a private ledger of who is owed which historical rate, where one lapse produces a conversation about being overcharged.

The counter-argument - that a long-standing buyer earned something - is better answered with something that does not compound: priority scheduling, a small addition to scope, first refusal on a slot.

The window that works

Three months is a reasonable default.

"Your existing rate holds for any job booked before the end of March; after that everything moves to the new card."

That gives a regular time to book at the old number and converts an open-ended obligation into a dated one.

For a buyer with something already agreed but not yet delivered, the old price always holds, without a window and without discussion. Repricing agreed work is genuinely indefensible.

Telling them before the listing does

The difference between an easy conversation and a bad one is who raised it. Buyers treat the last price they paid as theirs: Kahneman, Knetsch and Thaler (1986) found people feel entitled to the terms of the "reference transaction", which is why a change needs announcing.

A message from you, before the change goes live, reads as someone running a business. The same information discovered in a listing reads as something you hoped they would not notice, and invites the buyer to ask what else changed quietly.

Two sentences, sent once:

"Prices go up from the first of next month - the standard assessment moves from 35 to 45. Anything you book before then is at the current rate."

No apology and no justification, because explaining your costs never persuades anybody and it converts a notice into an opening bid.

If someone pushes back, restate the policy once: the old rate holds until the date, after that everyone is on the same card. "Everyone is on the same card" is the load-bearing phrase, because it is true and it is checkable.

When to hold a rate longer

Two cases justify going past the window.

A buyer on a regular schedule who represents a meaningful share of your month is a volume question rather than a discount question, and a standing rate for standing work is ordinary practice - the reasoning is the same as when a lower price per job earns its keep in throughput.

The other is someone whose public review or referral has visibly brought you work. Holding their rate is cheaper than acquiring the buyers they send you.

Everything else is drift.

Buyers tend not to experience a notified rise as a slight - the account of how these exchanges usually go from the commissioning side suggests people mind being surprised far more than they mind paying more. Keep the ledger of who was told what minimal; what is worth holding about the people who pay you is a smaller set than most earners assume, and a dated note against a handle is enough. None of this applies at the free automated end, where the tools you are compared against have no old rate to honour.

If the platform enforces a single current price per listing, grandfathering has to be done by hand as a manual adjustment or a private tier, which is worth checking against how judge pricing is configured before you promise anyone a rate the system will not hold.