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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesMeasure a building project’s local economic impact by defining the study area and counterfactual, converting the budget into a location-specific bill of goods, removing spending that leaks outside the area, and applying a stated input-output model. Report direct, indirect and induced effects separately for output, value added, earnings and employment. A project’s headline cost is not its local impact: only the portion spent with local businesses and paid to workers who spend income locally can generate the modeled local response.
The result is a scenario estimate, not a guaranteed number of jobs or dollars. A defensible analysis shows its geography, price year, construction schedule, local-purchase shares, worker-residence assumptions, multiplier type, data vintage and sensitivity range.
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1. Define what “local” and “impact” mean
Start by writing a one-sentence scope statement before opening a multiplier table. For example: “This analysis estimates the effect of the project’s construction spending in County A and its contiguous counties during the 2027–2029 construction period, in 2026 prices, relative to a no-project baseline.” The statement prevents a common error: presenting a regional result as if it were a national one, or mixing a one-time construction outlay with annual operating activity.
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Choose the study geography
Use the geography that matches the decision being made. It might be a county, a group of contiguous counties, a metropolitan area or a state. BEA RIMS II permits a county or an aggregation of contiguous counties, with effects tied to a specified change in final demand. A larger area generally captures more suppliers and worker spending, but it also produces a different answer. State the exact counties or other boundary; “local” by itself is not reproducible.
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Set the counterfactual
Define what would happen without the project. The baseline could be no construction, a smaller project, a different site or a different timing. The modeled change is the project’s incremental final demand against that baseline. If the project displaces another development, uses workers who would otherwise have been employed, or pulls activity forward from a later year, those effects belong in the counterfactual rather than being silently counted as new activity.
Fix the time and price basis
Specify the construction start and finish dates, whether spending is entered by month, quarter or year, and the price year. Keep one-time construction effects separate from recurring post-completion operations. A building that later houses tenants, creates payroll or attracts visitors can have an operating impact, but that is a separate scenario and should not be added to construction results without its own schedule and assumptions.
2. Turn the budget into a bill of goods
A cost plan is not yet an economic-impact model. Convert each budget line into the industry that supplies it, then identify how much of that purchase is supplied from inside the study area. The bill of goods is the bridge between an audited project budget and a multiplier.
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| Budget input | Examples to classify | Why the classification matters |
|---|---|---|
| Hard construction costs | Concrete, steel, lumber, mechanical and electrical equipment, site work | Each item maps to different supplier industries and has a different import and distribution pattern. |
| Labor | On-site trades, supervisors, engineers; residence of workers | Labor creates direct earnings and jobs, while worker residence affects how much income is spent locally. |
| Professional services | Architecture, engineering, legal, banking, insurance | These services may be supplied outside the region; the local share must be evidenced rather than assumed. |
| Equipment and logistics | Rental, fuel, haulage, maintenance | Some suppliers are local and some equipment or fuel is imported, changing the local production response. |
| Schedule | Spending by month or quarter and total construction duration | Timing prevents a temporary construction pulse from being reported as an annual permanent effect. |
| Post-completion operations | New tenants, payroll, purchases and visitor spending | Operations should be modeled separately from the construction phase. |
For each line, record the amount, supplying industry, supplier location, local-supply share, labor component where available, payment date and price basis. Preserve the original cost code so another analyst can reconcile the modeled total to the project’s approved budget.
Separate producer and distribution costs
Do not apply a construction multiplier to an undifferentiated lump sum. A purchase may include the producer’s value, wholesale and retail distribution, freight and other margins. The BEA RIMS II guide’s road-construction example requires producer and distribution cost shares to be assigned before final-demand multipliers are applied. This step determines which industries receive the initial demand and avoids overstating the response of the building contractor alone.
3. Identify local activity and leakage
Local impact is limited to the part of each transaction that generates production, income or household spending inside the chosen boundary. Localize the bill of goods using invoices, subcontracts, vendor addresses, payroll records and procurement commitments wherever possible.
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Common sources of leakage
- Materials manufactured outside the study area, even when purchased through a local distributor.
- Out-of-area general or specialty contractors and subcontractors.
- Profits remitted to owners whose business operations are outside the region.
- Architectural, engineering, banking or insurance services performed elsewhere.
- Equipment, fuel or components imported from outside the geography.
- Workers who commute from outside the study area and spend most of their earnings elsewhere.
- Taxes, savings and debt payments that do not become local household purchases in the selected framework.
BEA specifically cautions that architectural and banking services can be supplied outside the region. Treating them as local without evidence can materially reduce accuracy. A local mailing address is not proof that the production occurred locally: establish where the service was performed and where the income accrues.
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Calculate a localized demand change
For industry i, use:
Localized final-demand changei = project spendingi × local-supply sharei × price-year adjustment
Use a separate local-supply share for concrete, steel, design, equipment rental and other categories when the evidence supports it. If a share is unknown, show it as an assumption and test it in a sensitivity case rather than quietly treating it as 100 percent local.
4. Choose the effect scope before calculating
Every result must say whether it includes only production effects or also household spending. The terms below should appear in the tables and narrative, not just in an appendix.
Direct effects
Direct effects are the project’s initial construction output, payroll, earnings and jobs: the work performed by the prime contractor, subcontractors and on-site workforce represented in the localized project demand. Direct jobs may be temporary, part-time or full-time. State the unit used, such as job-years during construction, rather than implying that a two-year position is two permanent jobs.
Indirect effects
Indirect effects are additional production by local suppliers responding to purchases generated by construction. They include supplier activity for materials, equipment, transportation, professional services and other inputs that remain within the boundary.
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Induced effects
Induced effects are local household purchases made from income generated by direct and indirect activity. They depend on where workers live, how much income is spent rather than saved or taxed, and the model’s household-spending assumptions.
Type I, Type II and SAM conventions
Type I multipliers generally combine direct and indirect effects. Type II multipliers add household spending, while social-accounting-matrix frameworks can incorporate additional institutions and adjustments. Some frameworks separately account for taxes, savings and commuting. Never compare a Type I result with a Type II result as though they measured the same scope.
5. Apply the multiplier model step by step
- Prepare the localized industry changes. Map every bill-of-goods category to the model’s industry or final-demand sector and enter only the in-area portion, adjusted to the model’s price year.
- Obtain the multiplier set. Record the model name, geography, industry version, national and regional table years, multiplier type and release date.
- Calculate supplier effects. Multiply each localized industry change by the matching regional multiplier to estimate indirect production and, where applicable, induced effects.
- Add the direct change correctly. For total output, add the direct final-demand change to multiplier-derived supplier effects. For earnings and employment, add the direct industry change to the derived indirect and induced effects.
- Reconcile totals. Check that modeled direct spending reconciles to the project budget after exclusions, margins and price adjustments. Investigate any unexplained difference before publishing.
- Label the scope. Put “direct,” “indirect,” “induced,” and “total” beside every metric so a reader cannot mistake one component for the overall result.
Multipliers summarize the response to an initial change in economic activity; they do not predict a project’s actual procurement decisions. Capacity constraints, labor shortages, displacement and timing can make realized effects smaller or different from the modeled response.
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Do not collapse the analysis into one “economic impact” number. Each indicator answers a different question and should be reported with direct, indirect, induced and total components.
| Indicator | What it measures | How to explain it |
|---|---|---|
| Gross output | Sales or production across affected businesses | Useful for describing business activity, but it can count transactions at multiple stages of a supply chain. |
| Value added (regional GDP) | Income generated by production after subtracting intermediate purchases | Better for the project’s contribution to regional economic production than gross sales alone. |
| Earnings | Labor income associated with direct, supplier and household-spending effects | State whether the figure is payroll or broader earnings and identify the price year. |
| Employment | Jobs or job-years supported by the activity | Define the unit and construction period; do not present temporary job-years as permanent positions. |
RIMS II is designed to provide output, value added, earnings and employment. Presenting all four prevents a large sales figure from being mistaken for equivalent regional income or a permanent headcount.
7. Select a method that fits the decision
| Method | What it offers | Questions to resolve before use |
|---|---|---|
| BEA RIMS II | Official U.S. regional multipliers; county or contiguous-county geographies; output, value added, earnings and employment measures. | Obtain the relevant multipliers, map the bill of goods carefully and disclose assumptions. It is best suited to transparent documentation and small or medium changes. |
| IMPLAN | Commercial input-output platform with Type I, Type II and social-accounting-matrix options. | Compare license cost, geographic detail, data year, industry mapping and whether another analyst can reproduce the run. |
| AGC Construction Impact Model | Construction-focused estimates by state and project type using IMPLAN multipliers. | Check that its geography and construction categories match the project and that its scope matches your desired direct, indirect and induced definitions. |
| Input-output tools outside the United States | National statistical-office tools can apply the same direct and indirect logic to local projects. | Definitions differ. For example, the UK ONS guide’s Type 1 estimates exclude household-spending effects, so the effect scope must be stated explicitly. |
There is no universally superior model. Choose the one whose geography, industry detail, data vintage, licensing conditions and documentation fit the question. If a public body must defend the estimate, reproducibility and a clear assumptions file may matter more than a model with extra features.
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8. Use current data and document the vintage
Input-output results are tied to the tables used to build the multipliers. Record both the model release and the data years. BEA’s July 2024 RIMS II update used 2017 national benchmark supply-use tables and 2022 regional wages and employment. The RIMS II page reports a May 2026 release based on 2024 regional data. These vintages are not interchangeable: a result calculated with one release should not be described as though it came from another.
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- Study geography and the counterfactual.
- Construction start, completion and spending schedule.
- Price year and any inflation or deflation adjustment.
- Project cost source and reconciliation to the bill of goods.
- Industry crosswalk and producer/distribution cost treatment.
- Local-purchase shares and evidence for each major category.
- Worker-residence and commuting assumptions.
- Model name, release date, regional and national table years.
- Multiplier type, household-spending treatment and any tax or savings adjustments.
- Whether employment is jobs, full-time-equivalent jobs or job-years.
9. Stress-test the assumptions
BEA describes RIMS II results as approximate and most appropriate for small or medium changes. A single point estimate hides the assumptions that matter most. Run at least low, central and high cases for the variables below.
| Variable | Low case | Central case | High case |
|---|---|---|---|
| Local procurement | Use documented minimum shares or exclude unverified suppliers. | Use the best-supported shares from contracts and vendor data. | Use plausible upper shares only where local capacity and evidence support them. |
| Worker residence | Assume a larger commuting or nonlocal-worker share. | Use payroll or survey evidence. | Assume a larger local-resident share only when recruitment and residence data justify it. |
| Induced spending | Use Type I or conservative household-spending assumptions. | Use the selected Type II or SAM framework. | Use the framework’s upper plausible household-spending case, not an unbounded multiplier. |
Also consider capacity constraints, displacement of existing work, imports, taxes, savings and profits sent outside the region. Explain which assumption drives the range. A narrow range created by changing only one input is not a complete uncertainty analysis.
10. Keep construction and operations separate
Construction is a temporary demand shock. After completion, a building may generate tenant payroll, maintenance purchases, utility spending, visitor activity or property-management jobs. Collect those operating inputs separately, use an operating-year schedule and report the operating scenario as a different result. Combining both phases can make a one-time project look like a recurring annual contribution.
11. Common mistakes and how to correct them
- Calling the full project cost local. Correct it by applying a documented local-supply share to each industry category.
- Using one construction multiplier for every budget line. Correct it with an industry-level bill of goods and producer/distribution shares.
- Reporting only jobs. Correct it by adding output, value added and earnings, with direct, indirect and induced components.
- Counting induced effects without saying so. Correct it by naming Type I, Type II or SAM scope in every headline table.
- Calling job-years permanent jobs. Correct it by stating the employment unit and construction duration.
- Ignoring nonlocal workers. Correct it with residence evidence and a commuting sensitivity case.
- Mixing data vintages. Correct it by recording the model release and table years and rerunning the full estimate when the release changes.
- Treating a multiplier as a forecast. Correct it by describing the result as a scenario estimate and publishing the assumptions and range.
- Including operations in construction totals. Correct it with a separate post-completion model.
12. A publication-ready reporting format
A clear report can follow this order:
- Scope box: geography, counterfactual, construction dates, price year and project phase.
- Budget table: spending category, supplying industry, total cost, local share and localized demand.
- Results table: output, value added, earnings and employment, each split into direct, indirect, induced and total.
- Method note: model, release, data vintage, multiplier type, industry mapping and household-spending treatment.
- Uncertainty table: low, central and high results with the assumptions changed in each case.
- Limitations: leakage, commuting, taxes, savings, capacity, displacement and any missing procurement evidence.
This format lets a council, developer, lender or community group trace the result from a budget line to a regional indicator without treating the multiplier as a black box.
Frequently asked questions
How many local jobs will a construction project create?
There is no universal job figure. The answer depends on the project’s localized labor demand, worker residence, construction duration, industry mix and selected multiplier. Report direct jobs or job-years separately from indirect supplier jobs and induced jobs, and state the employment unit.
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How much of construction spending stays in the community?
Calculate it category by category from contracts, invoices and vendor locations. The local amount is not automatically the project cost: imported materials, outside contractors, nonlocal professional services and profits paid outside the area are leakages.
Should I use RIMS II or IMPLAN?
Use the model that provides the right geography and industry detail and can be documented and reproduced for your audience. RIMS II offers official U.S. regional multipliers; IMPLAN offers a commercial platform with multiple effect scopes. Compare data year, industry mapping, license terms and assumptions before choosing.
Can I add direct, indirect and induced jobs together?
Yes, when they are produced by the same geography, period, price basis and multiplier scope. Label the components and total, and do not combine Type I and Type II results or mix construction jobs with annual operating jobs.
How often should the estimate be updated?
Update it when the project budget, procurement plan, schedule or geography changes materially, and when the multiplier release or underlying regional data changes. Preserve the original run so readers can see why a revised estimate differs.
Frequently Asked Questions
How many local jobs will a construction project create?
There is no universal job figure. The answer depends on localized labor demand, worker residence, construction duration, industry mix and multiplier scope. Report direct jobs or job-years separately from indirect and induced jobs.
How much construction spending stays in the community?
Calculate the local share for each budget category using contracts, invoices and vendor locations. Imported materials, outside contractors, nonlocal services and externally paid profits are leakages.
Should I use RIMS II or IMPLAN?
Choose based on geography, industry detail, data vintage, licensing and reproducibility. RIMS II provides official U.S. regional multipliers; IMPLAN is a commercial platform with several effect scopes.
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Can direct, indirect and induced jobs be added together?
Yes, if they use the same geography, period, price basis and multiplier scope. Label each component and distinguish temporary job-years from permanent jobs.
When should an impact estimate be updated?
Update it when the budget, procurement plan, schedule, geography or multiplier release changes materially, while preserving the original run for comparison.
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