How to Invoice for Billable Hours vs Project Fees in QuickBooks

Use hourly billing when scope is uncertain#

If scope is still fuzzy, do not force a project fee. Here, hourly billing is your risk-control model. It makes the work visible, catches scope drift early, and reduces the chance that effort slips into unpaid goodwill.

Read the signals before you price#

Before you choose a billing model, get clear on the signals that most directly affect dispute risk and billing capture:

In practice, focus on whether the scope boundary is clear enough to defend in the engagement agreement, whether work descriptions are specific and understandable to the client, and whether your tracking process is consistent enough to avoid missed billable entries.

Hourly is usually the safer default when uncertainty is still high and boundaries are still moving. If the engagement has a fixed deliverable, stable inputs, and reliable historical patterns, that is usually when it makes sense to consider a project fee.

A simple rule: if you cannot describe the boundary of the work in one short paragraph and defend it in an engagement agreement, stay hourly for now.

Run a no surprises cadence#

Log time promptly and tie it to the agreed service and customer. Review unbilled entries before each invoice so omissions are caught while the work is still easy to explain.

Keep the operating standard plain: log time the same day, tie each entry to the right client and service description, and write descriptions a client can understand without translation. Then set a client-facing update cadence, usually weekly or at each agreed checkpoint, so the invoice never lands as a surprise.

Before billing, do one approval check. Did the work match the engagement agreement? Were out-of-scope requests flagged in writing? Do your billing descriptions line up with what the client already saw in updates?

That last step matters. Clear engagement agreements and transparent billing descriptions are strong protection against disputes. Common failure modes are predictable: undercharging, missed billable-time capture, and billing arrangements that create avoidable ethics risk.

Keep hourly profitable in QuickBooks#

For supported US QuickBooks Online plans, enable billable time in Settings → Account and settings → Time. Create a Single time activity, select the employee or vendor and customer/project, enter the service, description, hours and agreed rate, then mark it Billable and save. Role permissions and payroll connections can change available fields; use Intuit’s current time-tracking instructions for your configuration.

Create the customer invoice and add the outstanding billable time rather than entering the same hours again. For example, 12 approved hours at $100 per hour should produce $1,200 before tax. Review dates, service descriptions and prior billing to confirm the hours appear once. Time capture alone is not an invoice or a payment.

Use hourly when scope uncertainty makes a fixed price difficult to estimate. Agree a budget or not-to-exceed limit and flag approaching it before doing more work; logging time does not authorize unlimited billing.

Related: Choosing Time Tracking Software for Billable Hours.

Use project fees for a defined deliverable#

Use project fees only when you can still see profitability clearly as work moves. The goal is not just to quote a fixed number, but to keep your fee, costs, and profitability visible in your records so surprises show up early.

A practical readiness check before you quote: confirm the work is clear enough to track, review, and approve without constant re-interpretation. If it is not, keep using hourly billing until the engagement is more stable.

Use QuickBooks Online as your operating review loop#

QuickBooks Online Projects groups income and costs under a customer project in supported plans, including US Plus and Advanced. Assign relevant invoices, bills and expenses to the project, then review profitability. Confirm how labor enters your reports so estimated costs and actual payroll are not counted twice.

Run this review on a recurring cadence during active work. Data quality is the control point: if entries are late or inconsistent, profitability signals degrade. If others touch the books, train them and enforce clear entry rules so reporting stays decision-ready.

Document genuine scope changes and align invoice timing with the agreement. Correcting your own error or underestimating delivery time does not automatically create a billable change. Profitability and collections are separate: a profitable invoice can still remain unpaid.

Project fees reward efficient delivery within the agreed scope, while hourly billing pays for recorded time. Neither guarantees a higher margin: compare the fee with actual and remaining delivery cost before changing your pricing.

For a step-by-step walkthrough, see How to Automate Pass-Through Expense Tracking from Clients in QuickBooks.

Protect a project fee with usable scope and change terms#

State the deliverable, client inputs, revision allowance, acceptance criteria and invoice dates in the agreement. Define who may approve a change and how it affects price and schedule. A signed estimate can support approval evidence, but does not replace missing scope terms.

Use this sequence before billing fixed-fee changes:

For a hypothetical $3,000 project billed in three $1,000 milestones, create an estimate and use supported progress invoicing to bill each agreed portion. A separately approved $500 add-on needs a clear change reference and its own line or estimate. Check the estimate’s invoiced and remaining amounts before sending each invoice; do not accidentally bill the full $3,000 after two installments.

An estimate is non-posting; converting it to an invoice creates the billing record. Progress invoicing tracks billed portions, not proof that a deliverable was accepted or cash arrived. Retain the client’s approval and apply received payments to the relevant invoice separately.

Match hybrid, retainer, or value-informed pricing to the work#

The strategic move is to shift from reactive rate-setting to evidence-based pricing, and to use the model your current evidence can support without exposing you to avoidable margin risk.

These models are alternatives, not stages every freelancer must pass through. Choose hybrid for a stable base with variable extras, a retainer for recurring defined access or outputs, or a value-informed fee where the client’s expected benefit supports the price.

Hybrid implementation checklist:

• Keep base scope pricing and overage handling separate.
• State exactly what triggers overage work.
• Require written approval before extra work starts.
• Keep invoice visibility clean in QuickBooks by separating base fee lines from approved extra lines.
• Before sending, confirm each extra line maps to an approval date and approver name.

Retainer guardrails:

• Set service boundaries in writing.
• Set response expectations in writing.
• Set rollover policy in writing.
• Set a review cadence to confirm the retainer still matches real demand.
• Use supported recurring invoices for the agreed cadence, then review the generated invoice and actual receipt; scheduling is not payment.

Value-based workflow:

1. Baseline the current state.
2. Define the outcome metric.
3. Agree on attribution logic.
4. Set pricing bands tied to that shared logic.
5. If a required figure is not verified yet, mark it as pending in your working notes and keep it out of the pricing logic until both sides agree on the source.

Match the model to the work and keep its payment trigger explicit. Value-informed pricing may use a fixed fee payable on agreed dates; if payment depends on a measured result, define the baseline, measurement window, attribution and contingencies separately. Related: Value-Based Pricing.

Choose the model your work and records can support#

Choose where delivery, margin and cashflow risk sits, then use consistent records to see the result.

Use these working definitions to make decisions quickly:

• Billable hours: you bill for recorded time, which lowers delivery-risk exposure when scope is moving, but depends on disciplined time capture and regular invoicing.
• Project fees: you bill one fixed price for a defined scope, which improves price predictability for the client but increases your exposure if scope drifts.
• Hybrid model: you set a fixed base scope and price, then bill approved extras separately to balance predictability with flexibility.
• Value-informed pricing: use the client’s expected benefit to set a fee; a payment contingent on actual results is a separate arrangement requiring explicit measurement terms.

A project report is only as complete as its recorded costs. Keep direct delivery costs separate from shared overhead, use a documented allocation method for management review, and avoid counting labor twice. Classes categorize transactions; they do not automatically allocate all overhead or calculate a fully loaded net margin.

Use this implementation checklist before rollout:

• Scope and revision limits are written in plain language.
• Change requests follow a documented approval path before billing.
• Invoice timing is pre-set (billing periods or milestones) and visible to the client.
• Retainer guardrails are explicit (what is included, what triggers refill, and what is out of scope).
• Reporting views separate revenue, direct delivery costs, and allocated overhead by class/project.

If any item is weak, stay with the lower-risk model until controls are in place. You might also find this useful: A Guide to Time Tracking Software for Billable Hours.