CCP Domain 1, Managing Project Costs: What It Covers and How to Prepare

Why this is the domain to start with

On the CCP, every domain is scored and the scores are averaged; you need 70% overall. You can pass without passing every domain, but Domain 1 holds more questions than any other, so a weak result here is very hard to make up elsewhere. If your study time is limited, this is where it pays most.

The 27 tasks, grouped so they're easier to study

AACE lists the tasks from 1.A to 1.AA. Grouping them by theme makes them easier to work through.

Historical data

• 1.A Research historical database
• 1.B Develop analogous data sets (e.g., benchmarking, validating estimates, cost comparisons)
• 1.Q Organize current data
• 1.AA Compile historical data

Estimating

• 1.C Develop summary-level cost estimates
• 1.D Review detailed project estimates
• 1.E Prepare rough order of magnitude (ROM) estimates
• 1.F Verify basis of cost estimates
• 1.G Analyze cost estimates

Budgets and baselines

• 1.H Work with estimators to establish baseline budget
• 1.I Develop cost budget baselines (e.g., including time phased)
• 1.J Confirm change orders are included in baseline
• 1.K Monitor Budget-at-Completion (BAC)
• 1.L Forecast funding requirements
• 1.M Control operating budgets
• 1.N Create budgets
• 1.O Finalize budgets
• 1.P Adhere to cost system governance requirements

Tracking and validating costs

• 1.R Track actual and accrued costs
• 1.S Track committed costs
• 1.T Validate invoices
• 1.U Validate work-in-place accruals

Analysis and forecasting

• 1.V Identify/Evaluate cost drivers
• 1.W Evaluate impact of change orders
• 1.X Evaluate resource allocation/utilization
• 1.Y Conduct cost forecasting
• 1.Z Calculate Estimate-at-Completion (EAC) updates

Task wording is taken from the Certified Cost Professional Examination Blueprint (May 2026) in AACE's CCP Candidate Handbook.

The ideas underneath the tasks

Read the list closely and a handful of concepts keep coming back. Estimate maturity and accuracy, which our guide to AACE estimate classes explains. The basis of estimate, meaning the scope, assumptions and data an estimate rests on, and how to test them. Time-phased baselines and keeping approved changes inside them.

Then there's the distinction between actual, accrued and committed cost, which trips people up more than it should: money already paid, work done but not yet invoiced, and money tied up in contracts and purchase orders. Forecasting brings in Budget at Completion and Estimate at Completion, which overlap with the earned value material in Domain 4; our formulas guide covers the calculations. Engineering economics, the time value of money behind cost comparisons, also runs through this domain.

How to prepare for it

Start by being honest about your own experience. Most candidates do several of these tasks every week and barely touch others. A cost controller on site may know invoice validation and accruals inside out but rarely prepare a ROM estimate; an estimator may be the reverse. Mark the tasks you don't do at work and study those first.

Use AACE's references for the theory: Skills & Knowledge of Cost Engineering and RP 10S-90 for terminology, both covered in our study materials guide. Practise the calculations on the kind of stand-alone calculator you'll use in the exam, not a spreadsheet. And before the real thing, sit at least one full-length timed practice exam; our mock exam guide explains how to review it.

Our 12-week study plan shows where Domain 1 fits alongside everything else, and 3FOLD Training's article on how to pass the CCP exam has wider preparation advice.