A solo consultant or engineering firm owner’s defined benefit plan review should connect project collections, payroll, compensation, staffing changes, and annual responsibilities.
A solo consultant should test a defined benefit plan against collected cash, adjusted compensation, future hiring, and the cost of keeping the plan running. A strong project pipeline alone cannot answer the funding question. The IRS describes a formula-based retirement benefit and an enrolled actuary’s annual role in determining funding. Our business-owner checklist covers general fit; this guide focuses on uneven professional-service revenue, including an independent architect who invoices at project milestones.
For an engineering firm owner, extend the same review to payroll that continues between project payments, subcontractor commitments, and planned staff changes. The worksheet below turns a project forecast into questions for the defined benefit plan actuary and administrator.
Build a project schedule with four separate amounts: signed work still to perform, completed work awaiting an invoice, invoices awaiting payment, and cash already collected. These amounts answer different questions. A signed design engagement may require substantial work before the next billing milestone. Unbilled work may depend on approval before invoicing. An invoice may be disputed or paid later than expected. None of those entries should automatically be treated as money available today.
For an architect, record each phase’s billing trigger, expected acceptance date, invoice date, collection assumption, and remaining consultant costs. Use the actual agreement rather than assuming every project bills monthly. For other solo consultants, adapt the schedule to deliverable acceptance, retainers, or renewal dates. Reconcile it with the bank and receivables records used in a monthly close review. This is a cash-planning exercise; it does not decide when revenue is recognized for accounting or tax purposes.
Original hypothetical, not a client result: an independent architect has $110,000 in the operating bank account, $70,000 of unpaid invoices, and $45,000 of completed design work awaiting a billing milestone. The architect also expects a $90,000 phase payment after client approval. For today’s screen, start with the bank account. Keep the unpaid invoices, unbilled work, and expected phase payment in the forecast, with their uncertainty visible.
Assume $30,000 is committed to outside engineering consultants, $20,000 to operating costs, $25,000 to tax reserves, and $15,000 to owner living needs. Protect another $10,000 as an operating cushion. The resulting near-term headroom is $10,000: $110,000 minus those five commitments. If a proposed plan payment were $40,000, the screen shows a $30,000 cash gap. Those amounts are illustrative assumptions, not allowable contributions, plan compensation, or deductions.
Now delay the expected phase approval and collection in a second forecast while keeping committed consultant payments on their actual due dates. Ask how the gap would be funded without counting the same receipt twice. If the answer depends entirely on an uncertain milestone, resolve that timing before adopting a plan. If a plan already exists, bring the forecast promptly to the actuary and administrator; a cash gap is not permission to skip a required payment.
Use one row per engineering project and a separate row for shared firm costs. Choose a forecast horizon that reaches every proposed payment date supplied by the plan professionals. A short cash screen helps identify pressure points; it cannot establish affordability over the life of a defined benefit plan.
| Worksheet row | Record from the firm | Decision to resolve |
|---|---|---|
| Approved scope | Remaining contracted fee, deliverables, and engineering hours still needed. | Does the remaining fee cover the work and committed outside costs? |
| Billing gate | Required acceptance, invoice submission, and any contractually withheld payment. | What must happen before the receipt belongs in the collection forecast? |
| Cash timing | Unpaid invoice amounts, expected collection dates, and the evidence for each date. | Which receipt would create a gap if it arrived later? |
| Delivery costs | Payroll, payroll taxes, specialist invoices, software, insurance, and due dates. | Which payments continue while the project receipt is delayed? |
| Staffing change | Proposed hire date, compensation, service expectations, and employee census. | Has the administrator reviewed participation and the actuary modeled the resulting funding? |
| Plan obligations | Professional funding calculation, fees, confirmed dates, and assigned responsibilities. | Can the firm support those obligations in both the base forecast and a weaker scenario? |
Use the billing terms in each signed agreement. If an engineering contract includes acceptance gates, retainage, or a disputed change order, show the affected receipt separately until the forecast has a defensible payment assumption. Avoid using one large backlog total to stand in for these different risks. A late receipt can affect several payroll cycles even when the project remains profitable.
Illustrative planning example, not a client result: a small engineering practice starts a 90-day forecast with $180,000 of bank cash. It expects to collect $80,000 on an already issued invoice and $100,000 after a design package is accepted. Neither expected receipt is included in opening bank cash. Forecast outflows are $95,000 for existing payroll and payroll taxes, $35,000 for committed specialists, $25,000 for other operating costs, and $30,000 for tax reserves and owner living needs. The owner also protects a $30,000 operating cushion. These assumptions leave $145,000 of headroom if both receipts arrive during the forecast: $180,000 plus $180,000 of receipts, less $185,000 of outflows and the $30,000 cushion.
Suppose, solely for this cash exercise, that a professional illustration presents a $60,000 plan payment and $5,000 in fees. The base forecast leaves $80,000 after those payments. If acceptance and the $100,000 receipt move beyond the forecast, headroom falls to $45,000 before plan funding and fees, creating a $20,000 gap after them. Now add a planned engineer whose payroll and payroll taxes add $18,000 during the same period. The delayed-receipt scenario has a $38,000 gap. That calculation excludes any change in plan funding from the hire; the actuary must model that separately.
All amounts are hypothetical cash assumptions, not contribution limits, deduction amounts, or an actuarial calculation. Lay out receipts and outflows by week as well as in total: a positive ending balance can hide a payroll shortfall before a large receipt arrives. Extend the review beyond this 90-day example to the firm's expected project cycle and the plan's actual funding obligations.
Before adopting a plan, resolve a forecast that depends on unapproved work, an uncertain collection, or an unmodeled hire. For an existing defined benefit plan, report the changed forecast promptly to the actuary and administrator and obtain the applicable next steps. Moving a project collection date does not move a legal funding obligation.
Bring entity and ownership records, prior returns, current financials, owner payroll or draw records, and existing plan documents to the tax adviser and actuary. The IRS explains special self-employed compensation calculations; Schedule C net profit requires adjustments. Gross project fees and an owner’s withdrawals do not establish the permissible funding amount. Ask the advisers to document the sponsoring employer and the compensation definition used in the illustration.
Request a written benefit assumption, funding range, investment assumptions, administration fees, and the circumstances requiring an updated calculation. The IRS explains that employer contributions normally vary annually as the actuary determines the required minimum. A preliminary illustration should therefore be compared with several cash scenarios rather than treated as a permanent quoted payment.
List employees, a spouse on payroll, partners, related businesses, and likely hires, with compensation and service records. Separately identify outside consultants and ask the adviser to review worker classification when uncertain. Calling a business “solo” does not settle coverage. The IRS qualified-plan guide addresses participation, coverage, and operation under the written document. Ask the plan professional to model a plausible staffing change and explain the effect on funding and administration.
Give the plan professionals both the current employee census and a second version reflecting the engineering hire, a departing employee, or a change in an owner's compensation. Ask for the coverage analysis, funding effect, administration cost, and records needed for each version. The IRS guide's participation, nondiscrimination, and coverage sections explain why the owner cannot decide employee coverage from job title alone. Confirm the applicable plan terms rather than promising an employee an exclusion or a particular benefit.
Record a decision owner for each open item: the bookkeeper validates project collections and payroll, the owner confirms contracts and hiring plans, the actuary calculates funding, and the administrator confirms operation and reporting. Obtain each provider's actual scope in writing. Where ERISA applies, the Department of Labor's provider guidance calls for prudent selection and ongoing monitoring. A provider agreement should make clear who receives changed data and how the firm reviews the service.
Ask the administrator which return, actuarial schedule, notices, and dates apply, including whether the one-participant filing rules affect the plan. Put each confirmed obligation on a calendar with a responsible person and cash source. Keep the plan’s funding schedule separate from the project’s billing schedule; the administrator must confirm the actual legal dates.
The Department of Labor’s employer guidance explains fiduciary duties for plans subject to ERISA. Clarify applicable sponsor duties, provider fees, record delivery, and review procedures in writing. Assign who reports changed payroll, delayed collections, hires, and investment results to the appropriate professional.
TaxBowl’s tax team can help organize accounting and tax inputs for an individualized feasibility review. Ask the enrolled actuary to determine funding, the administrator to confirm plan operation and filings, and the tax adviser to assess deduction treatment. Proceed only when the cash forecast and professional review support the commitment.
