How to Bill a Monthly Retainer Client

Retainers get forgotten when the month is billed by memory

A bookkeeping client, an IT support contract, or a monthly consultation is billed the same amount every month. When the bill is raised by memory, one month is skipped, another is raised twice, and the client statement no longer matches what both sides expect.

Payments for a retainer arrive late and in parts. If every month sits in one long running balance, nobody can tell which month the client is behind on, and the conversation with the client becomes an argument about totals instead of a list of months.

Staff who collect the money often see the monthly fee and every other client on the same sheet. That is exactly what a services firm wants to avoid.

Why this happens

• The retainer lives in a calendar reminder instead of on the client record.
• Each month is typed by hand, so the amount and the reference drift between months.
• Payments are written against the client, not against the month they paid for.
• The person collecting can see the fee and the balance of every client.

Biznsbook addresses this through Monthly retainer jobs, next bill date, billed job for each month when Service Billing & Collections is licensed. Clients are the parties you already keep, and collectors record what they received without seeing the fee or the outstanding.

Services firms lose money in the gap between the work done and the payment recorded. Keeping the fee on the job, the payment against the job, and the collector away from the numbers closes that gap without turning the firm into an accounting office.

Step-by-step: Bill a Monthly Retainer Client

Built for owners of services firms and the staff who collect client payments in Biznsbook Collections.

1. Turn Collections on and add a service type. License Service Billing & Collections for the company. Under Service types, add the service you sell on retainer, for example Monthly bookkeeping, with an optional default fee.
2. Open a job for the client. From Jobs, add a job for the client party. Give it a service reference such as Bookkeeping retainer, the date the arrangement started, and an assignee if one person looks after the client.
3. Choose monthly retainer in the Billing section. Job edit is split into Core, Billing, and Other. In Billing, choose the monthly retainer, enter the monthly fee, and the next bill date. The job itself stays the schedule.
4. Let Collections add each month. When the next bill date arrives, Collections adds a billed job for that month and moves the date forward one month. Opening the dashboard does this, and a daily background job does it as well, so a month is not missed when nobody logs in.
5. Add tax if your fees carry it. Settings has a tax percent for fees. It is calculated when the fee is saved and is included in outstanding. Zero means no tax.
6. Record payments against the month. Collectors pick that month’s service reference on Record a payment. They see the reference, never the fee or what is still owed. A payment larger than the month is accepted and the extra becomes an advance.
7. Review the client statement. The client statement lists every monthly job and every payment, with outstanding in the company currency. Print it or create a client portal link for the client.

Review results after the first full weekly cycle. Adjust roles, mappings, or approvals where the same exception repeats.

Screen names in this guide match Collections in the product: Record a payment, My entries, Dashboard, Jobs, Payments, Payment links, Corrections, Service types, Settings, and Guide. Every screen has a ? help button.

Common mistakes to avoid

• Mistake 1: The retainer lives in a calendar reminder instead of on the client record. Repeating this each month usually shows up first in billed, collected, or outstanding for the period.
• Mistake 2: Each month is typed by hand, so the amount and the reference drift between months. Repeating this each month usually shows up first in billed, collected, or outstanding for the period.
• Mistake 3: Payments are written against the client, not against the month they paid for. Repeating this each month usually shows up first in billed, collected, or outstanding for the period.
• Mistake 4: The person collecting can see the fee and the balance of every client. Repeating this each month usually shows up first in billed, collected, or outstanding for the period.

Note each recurring gap in the weekly review; each should map to a step in this guide.

Best practices that hold up as you scale

• Turn Collections on and add a service type — License Service Billing & Collections for the company.
• Open a job for the client — From Jobs, add a job for the client party.
• Choose monthly retainer in the Billing section — Job edit is split into Core, Billing, and Other.
• Let Collections add each month — When the next bill date arrives, Collections adds a billed job for that month and moves the date forward one month.
• Add tax if your fees carry it — Settings has a tax percent for fees.

Firms that keep the fee on the job, let Collections compute outstanding, and correct by reversal instead of editing a row keep their period totals and their trail intact.

How Biznsbook supports this workflow

Monthly retainer jobs is part of Biznsbook Service Billing & Collections. Each client is a party you already keep, each job holds its fee, and each payment keeps who entered it, when, and how the client paid.

next bill date is part of Biznsbook Service Billing & Collections. Each client is a party you already keep, each job holds its fee, and each payment keeps who entered it, when, and how the client paid.

billed job for each month is part of Biznsbook Service Billing & Collections. Each client is a party you already keep, each job holds its fee, and each payment keeps who entered it, when, and how the client paid.

Ledger posting is off until Collections settings turn it on, and only when Accounting or Finance is licensed. Outstanding is the fee plus any tax, minus the payments on the job. Collectors do not see fees, outstanding, other people’s entries, the dashboard, statements, the correction queue, or a journal.

Suggested implementation timeline

1. Week 1: Add your service types, check that clients exist as parties, and open jobs with fees.
2. Week 2: Start Monthly retainer jobs with one collector and a handful of clients.
3. Week 3: Add the rest of the collectors and clear the dashboard attention items daily.
4. Week 4: Review billed, collected, and outstanding by age with the client statements.
5. Ongoing: Weekly review using one schedule, one billed job per month and the dashboard.

Related guides

Start with track a service job and fee and record a client payment without showing the fee. Then bill a monthly retainer, split a fee into installments, and read billed, collected, and outstanding.

All guides: service billing & collections. Decision page: service billing software vs spreadsheets. Product page: Service Billing & Collections.

How the monthly job is created

When the next bill date is today or earlier, Collections creates a billed job for that month with the monthly fee, adds tax if Settings has a fee tax percent, and moves the next bill date forward one month. If more than one month is due, each month gets its own job.

The dashboard and the daily background job both look for due retainers. A month that already has its billed job is not created again, so opening the dashboard twice does not double the bill.

Months already billed keep their own outstanding until they are paid, so changing the monthly fee on the schedule never rewrites a month that has already been billed.

Recording retainer payments without showing the fee

A collector searches the client by name or phone, picks the month’s service reference, enters the amount, the mode, and the UTR for non-cash payments, and submits. The confirmation is the payment reference only.

When a client pays two months at once, the owner can split the payment across both months on Allocate. The parts must add up to the payment. Money that is not on a month yet stays as an advance.

If a payment was recorded against the wrong month, the collector requests a correction with a reason. Approval reverses the original and writes the corrected entry. The original is never overwritten.

Reading retainer income on the dashboard

The dashboard shows billed, collected, and outstanding for the date range you choose, billed by service type, collections by mode and by the person who entered them, and outstanding by age. A retainer service type shows how much of the month’s billing is recurring.

Outstanding by age makes a client who has stopped paying a retainer visible within the month, not at year end.

Metrics to track monthly

• Billed for the date range
• Collected for the date range
• Outstanding, and outstanding older than 90 days
• Collections by payment mode
• Payments not yet reconciled

Start with three metrics; trend direction matters more than a single point-in-time snapshot.

Spreadsheets and notebooks vs Biznsbook Collections

Compare running this on spreadsheets with Biznsbook Monthly retainer jobs and related capabilities.

One schedule, one billed job per month

The retainer job is the schedule: it holds the monthly fee and the next bill date. Each month becomes its own billed job, named after the month, so outstanding is visible per month. Payments are recorded against the month the client is paying for, and the statement shows both the months billed and the payments received.

Write this into your weekly owner routine and revisit it when you add collectors or new services.

Frequently asked questions

How this differs by industry