Accountants Project Quote (Hourly) Formula
Learn how to calculate an estimated accounting project quote from hours, hourly fees, expenses, contingency, and tax.
An hourly-based project quote starts with the expected time required and then accounts for uncertainty, direct project costs, and applicable sales tax or VAT. This calculation helps make the pricing components visible before a quote is issued.
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Total Project Quote
Where:
Multiply estimated billable hours by the hourly rate, add the contingency allowance and expenses, then apply sales tax or VAT to get the total project quote.
Variables Explained
| Variable | What It Means | Unit |
|---|---|---|
| estimatedHours - Estimated billable hours | Total expected billable time for planning, meetings, review, preparation, revisions, and communication. | hours |
| hourlyRate - Hourly rate | Fee charged for each billable hour before expenses, contingency, and tax. | currency |
| contingencyPercent - Contingency allowance | Percentage added to professional fees for uncertainty or additional expected work. | percent |
| expenses - Estimated expenses | Expected project costs such as filing fees, travel, software, or third-party services. | currency |
| taxRate - Sales tax or VAT rate | Applicable tax percentage charged on the pre-tax quote. | percent |
Step-by-Step Calculation
Calculate professional fees
Calculate the labour-based portion of the quote from expected hours and the hourly rate.
professionalFees = estimatedHours * hourlyRate
Calculate the contingency amount
Apply the contingency percentage to professional fees only.
contingencyAmount = professionalFees * (contingencyPercent / 100)
Build the pre-tax quote
Add the time-based fee, scope buffer, and estimated expenses.
preTaxQuote = professionalFees + contingencyAmount + expenses
Calculate tax
Apply the entered sales tax or VAT rate to the pre-tax quote.
taxAmount = preTaxQuote * (taxRate / 100)
Calculate the total project quote
Add tax to the pre-tax quote to obtain the estimated client-facing total.
totalProjectQuote = preTaxQuote + taxAmount
Calculate the effective hourly quote rate
Divide the all-in total by estimated hours to show how expenses, contingency, and tax affect the quoted amount per hour.
effectiveHourlyQuoteRate = totalProjectQuote / estimatedHours
Bookkeeping clean-up project quote example
Professional fees
12 × 150
$1,800
Contingency allowance
1,800 × (10 / 100)
$180
Pre-tax project quote
1,800 + 180 + 100
$2,080
Tax amount
2,080 × (0 / 100)
$0
Total project quote
2,080 + 0
$2,080
Effective hourly quote rate
2,080 / 12
$173.33 per hour
Final Result
Estimated total project quote: $2,080.00, including $0.00 tax.
Assumptions
- ✓All estimated hours are billable at the entered hourly rate.
- ✓Contingency is calculated on professional fees and not on expenses.
- ✓Expenses are added without a separate markup.
- ✓Sales tax or VAT is calculated on the full pre-tax quote.
- ✓The scope, deliverables, and client information needs are reasonably understood when the estimate is prepared.
Limitations
- !Actual time can differ when records are incomplete, requirements change, or additional queries arise.
- !Tax treatment and whether expenses are taxable can vary by location and transaction.
- !The calculation does not address payment schedules, retainers, discounts, write-offs, or late-payment charges.
- !A calculated estimate does not replace clear engagement terms or a documented scope of work.
Common Mistakes to Avoid
Entering only preparation time and omitting meetings, client communication, review, and revisions.
Applying the contingency percentage to expenses when the calculation applies it only to professional fees.
Treating pass-through costs as zero even when filing, travel, software, or third-party costs are expected.
Confusing the pre-tax quote with the total amount payable when tax applies.
Using an effective hourly quote rate as though it were the underlying billable hourly rate.
Related Formulas
Frequently Asked Questions
What is the formula for an hourly accounting project quote?
Multiply estimated hours by the hourly rate, add contingency and expenses, then apply any applicable tax to the pre-tax amount.
Is contingency calculated before or after expenses?
In this calculator, contingency is calculated from professional fees before expenses are added.
How is the effective hourly quote rate calculated?
It is the total project quote, including expenses, contingency, and tax, divided by estimated billable hours.
Does the formula include sales tax or VAT?
Yes. The entered tax rate is applied to the pre-tax quote. Enter 0% when tax is not being included in the calculation.
Can this formula be used for a fixed-fee accounting engagement?
It can provide an hourly-based estimate to support a proposed fixed fee, but the final pricing structure depends on the agreed engagement terms.
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