Unused retainer hours: should they roll over?

Sooner or later a retainer client asks, "Can we keep the hours we did not use?" The question feels small, but the answer decides how much work you may owe later for the same monthly fee. This post compares three ways to handle unused hours, shows what each one costs with simple numbers, and lists the terms to put in writing.

Why clients ask

A retainer is a promise to reserve your time. When the client does not use all of it, they feel they paid for something they did not receive. That feeling is reasonable, and it is a sign the client wants value from the arrangement, not a sign they want to cheat you.

You also have a reason to hold your ground. The hours were reserved for them. You kept that time free and turned down other work to do it. The unused time did not come back to you as income.

Both views are fair. The goal is a rule that treats the unused hours as a known cost and not a surprise.

Three ways to handle unused hours

Use it or lose it. Hours that are not used by the end of the month expire. The fee stays the same.

Capped rollover. Some unused hours carry into the next month, up to a limit you set, and they expire after a short window.

Full rollover. Every unused hour carries forward with no limit and no expiry.

Each option shifts risk between you and the client in a different way. The example below puts numbers on that.

A worked example

Say you sell a retainer of 20 hours a month at $120 an hour. The monthly fee is 20 x 120 = $2,400. This is an example, so use your own hours and rate.

In a quiet stretch, the client uses 14 hours a month and leaves 6 unused.

• Use it or lose it. You collect $2,400 for 14 hours of work. The effective rate is 2,400 / 14 = $171.43 an hour. You earn more per hour, and the client may feel the retainer is poor value.
• Full rollover. After six quiet months, the client has banked 6 x 6 = 36 hours. Those hours are worth 36 x 120 = $4,320 at your rate. If the client then asks for all of them in one month, you owe 20 + 36 = 56 hours of work for a $2,400 fee. That is a problem if your team has no room for it.
• Capped rollover. Say you cap rolled hours at 10, which is half of one month. The most you can ever owe on top of the monthly 20 hours is 10 hours, worth 10 x 120 = $1,200. The risk is limited and you can plan for it.

The comparison shows the main point. Use it or lose it protects your capacity. Full rollover protects the client's sense of fairness. A capped rollover sits between them.

Rollover is a capacity promise

A banked hour is a promise that you will have someone free when the client calls. The longer the bank grows, the bigger the promise.

Before you agree to any rollover, check your capacity. If your team is close to full, a surprise spike of 56 hours is hard to meet. If you have slack, a small rollover costs you little.

A good test is to ask what the worst month would look like under the rule. Work out the maximum hours the client could request, then ask whether you could deliver them without missing other deadlines. How to track time on a retainer without overservicing helps you see where the hours go each month.

Options that sit between the three

You do not have to choose one of the three as written. A few variations are common.

• Credit instead of hours. Unused hours convert to a credit at a lower rate, for example half. With 6 unused hours, that is 6 x 120 x 0.50 = $360 off a future invoice.
• One-month rollover only. Unused hours carry into the next month and then expire. This is a short window that covers a late start without building a bank.
• Use first, or use last. Decide whether rolled hours are used before the new month's hours or after them. Using the oldest hours first keeps the balance from growing.
• Trade for a longer term. Offer a rollover in return for a longer commitment. For related terms, see how to renew a retainer client.

Pick the version you can explain in one sentence. A rule that needs a diagram will cause arguments later.

What to write in the agreement

Put the rule in the retainer document and not in an email thread. Cover these points:

1. The unit. State whether you count hours, deliverables or availability.
2. The rollover rule. Say whether unused hours expire, roll over with a cap, or convert to credit.
3. The cap and the expiry. Give the numbers, such as "up to 10 hours, expiring after 30 days".
4. The order of use. Say which hours are used first.
5. What happens when the retainer ends. State whether any remaining balance is forfeited, credited or refunded.

The retainer scope template gives you a place to record these terms next to the scope. If you also sell blocks of hours, prepaid hour banks have their own rules on expiry and balances.

This is general information, not legal advice. Rules on unused balances and refunds vary by place, so have a professional review your agreement.

Keep the balance visible

Rollover only works if both sides can see the numbers. Send the client a short monthly note with hours used, hours rolled over and the hours expiring. Surprises on either side come from balances nobody checked.

HireOrSell can record time against projects on its paid plans, which gives you the hours used to put in that note. A spreadsheet with one row per month also works.

Next step

Look at your current retainers and note how many hours each client left unused over the last three months. Then pick one rule from this post, work out the worst month it could create, and add it to your next retainer renewal.