The first month of a new retainer is the most important month.
Not because of the work you do — though that matters — but because of the expectations you set. Every assumption the client makes about how the relationship works, how you communicate, how billing happens — all of it gets formed in month one.
Get it right and the retainer runs smoothly for years. Get it wrong and you spend the next six months correcting misalignments that didn't need to happen.
Before the work starts — the onboarding document
Send the client a brief onboarding document before the first session. If you haven't signed one yet, use a solid retainer agreement template as your starting point.
| What to include | Why |
|---|---|
| Included hours + billing date | Sets financial expectations |
| Overage rate | No surprises later |
| How to contact you | Prevents being treated as on-call |
| How to submit work requests | Reduces scope creep |
| Portal access link | Gets them checking it from day one |
💡 Pro tip
Invite clients to their portal before any hours are logged. Let them see it empty. That way they understand what they're looking at before they have any reason to be confused — or anxious.
The first session
Log your first session immediately after it happens, with a detailed description.
Then send the client a brief note after the first week: "Wanted to check in after our first week — here's a summary of what I've been working on. You can see all the detail in your portal. Let me know if you have any questions."
This does three things at once: demonstrates proactive communication, draws the client's attention to the portal, and gives them a natural opportunity to flag anything that wasn't what they expected — before it becomes a problem.
Sort out billing logistics in week one
Clarify payment logistics before the first invoice — not when you're waiting for payment.
- What payment method does the client prefer?
- Who receives the invoice — the person you work with, or accounts payable?
- Is there a PO number that needs to be on the invoice?
- Are there approval steps you should know about?
Finding out an invoice needs three people's approval is much better to discover in week one than when you're wondering why payment is late.
The mid-month check-in
Around the midpoint of the first month, send a brief check-in. How are things going? Any feedback on the working process? Is the work meeting expectations?
This isn't asking for approval. It's giving the client an opportunity to course-correct early rather than waiting until month three to have a conversation that should have happened in week two.
The first invoice
If you've been transparent about hours throughout the month using a client portal, the first invoice should be anti-climactic.
The client has seen the hours build in the portal. The invoice is just confirmation of what they already knew.
Include a brief note: "Here's your first monthly invoice. You can see the full breakdown in your portal. Looking forward to continuing next month."
✓ How to measure month one
If the first invoice generates zero questions, month one was a success. That's the bar. Everything you did in month one was building toward that moment.
The 90-day review
After the first two or three months, have an explicit review conversation. Is the retainer covering the right scope? Is communication working? Is there anything that isn't working as expected?
You landed them — here's how to get more retainer clients using the same approach.
Retallio handles the transparency side automatically — hours, work logs, invoice preview — so clients are always informed without you having to manually update anything.