Retainer vs. Hourly Calculator
Which billing model actually pays you more? See your real effective rate with scope creep built in.
What is the Retainer vs. Hourly Pricing Calculator?
The Retainer vs. Hourly Calculator shows consultants and coaches the true effective hourly rate of a flat monthly retainer — after scope creep and admin time — so you can see instantly whether a retainer offer pays more or less than billing the same client hourly.
How is it calculated?
Enter your expected monthly client hours, your current hourly rate, the proposed flat retainer amount, and a scope-creep buffer (the percentage of hours that typically run over estimate). The calculator divides the retainer by your real expected hours to reveal your effective hourly rate, then compares it side-by-side against straight hourly billing.
Worked example: is a $2,500 retainer a good deal?
- Start with scoped hours
The client engagement is scoped at 20 hours per month.
- Add a scope-creep buffer
Retainers typically run 15–30% over scope. With a 20% buffer, real workload = 24 hours.
- Compute the effective retainer rate
$2,500 ÷ 24 real hours = $104.17/hour — that’s what the retainer actually pays you.
- Compare against hourly billing
The same 20 scoped hours billed at your $150 rate = $3,000/month — and overruns get billed too.
- Read the verdict
Hourly wins by $500+/month here. Either raise the retainer to at least $3,600 (24 hrs × $150) or cap included hours in the contract.
Retainer vs. hourly billing: which fits your consulting practice?
| Factor | Monthly retainer | Hourly billing |
|---|---|---|
| Income predictability | High — fixed amount arrives every month | Low — varies with booked hours |
| Scope creep risk | You absorb it — extra hours dilute your rate | Client pays for it — every hour is billed |
| Cash flow | Often paid up front | Paid after work is invoiced |
| Client budgeting | Easy — predictable line item | Harder — fluctuating invoices |
| Your effective rate | Falls as hours grow | Constant by definition |
| Best when | Work is ongoing and predictable | Scope is uncertain or one-off |
Frequently Asked Questions
Is a retainer better than hourly billing for consultants?
A retainer is better when its effective hourly rate — the retainer amount divided by the hours you actually work, including overruns — meets or beats your hourly rate. Retainers add predictable income, but scope creep can silently push your real rate 20–40% below what you’d earn hourly.
How do I calculate my effective hourly rate on a retainer?
Divide the monthly retainer fee by the total hours you actually spend on the client each month, including meetings, admin, revisions, and overruns. A $4,000 retainer that consumes 50 real hours pays an effective $80/hour — even if you scoped it at 40 hours.
What is scope creep and how much should I budget for it?
Scope creep is unpaid work that grows beyond the original agreement — extra calls, ‘quick’ revisions, out-of-scope requests. Most consultants underestimate hours by 15–25%, so build at least a 20% buffer into any retainer price to protect your effective rate.
How do I price a monthly retainer correctly?
Start with the hours the engagement realistically requires (scoped hours plus a 15–25% buffer), multiply by your target hourly rate, and add a premium of 10–20% for priority access. Then track actual hours monthly — if your effective rate drops below target, renegotiate at renewal.
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