Project Profitability Calculator – Track true profit after tools, taxes, time

⚠️ Data Sources and Disclaimer: This calculator guide draws on: BuildFolio March 2026 (overhead formula; contractor overhead 30-50%); Digitsum freelance rate calculator (25-35% overhead + tax planning; 60-75% billable hours); FreelanceFin August 2025 (1,175 annual billable hours formula; tax buffer 25-30%; 15-25% scope buffer); SelfEmployed November 2025 (realistic billable hours 900-1,400/year; actual rate increase case studies); Plutio rate calculator (Toggl data: 60-70% billable; Kaiser Family Foundation health insurance $6,584/year; profit margin 10-20%); Jobbers.io Medium February 2026 (platform commission comparison: Jobbers.io 0%, Upwork typical 10%, Fiverr 20%); Jobbers.io Upwork Fees Explained January 2026 (effective rate 12-13%; total 15-20%; Connects $0.15); Jobbers.io Freelance Benchmark Report 2026 February 2026 (0% commission; 300,000+ daily visits; Payoneer 57% international rate premium); Wise UK homepage Q4 2025 (74% instant transfers; 0.35-1.5% fee); Payoneer pricing February 2026 (same-currency $1.50; cross-currency up to 2%); Stripe documentation 2026 (2.9% + $0.30 US card); IRS 2025 self-employment tax rate (15.3% on net earnings); Kaiser Family Foundation (average employer health insurance contribution $6,584/year). All rates and tax calculations are estimates for informational purposes and may change. Consult a qualified tax professional for your specific jurisdiction and situation.
Introduction: Why Most Freelancers Are Overconfident About Project Profitability
When a client pays $5,000 for a project, most freelancers experience that payment as $5,000 in income. The reality is different. Subtract 20% Fiverr commission ($1,000). Subtract Payoneer’s 2% cross-currency withdrawal ($80). Subtract the tool overhead allocated to this project ($120). Subtract 40 actual hours against a 30-hour quote because of revision rounds ($800 in uncompensated time at $80/hr effective rate). Subtract 28% estimated tax on the net profit ($795). The remaining true net profit: $2,205 on a $5,000 invoice — a 44.1% effective take-home rate from work that appeared profitable.
This is not unusual. It is the default state for most freelancers who have not built a structured project profitability calculation. Worse, the problems compound invisibly: scope creep accumulates without change orders; platform commissions are paid automatically without being registered as a cost; tool subscriptions renew without being allocated to projects; tax reserves are not set aside until the quarterly or annual bill arrives.
This guide provides the complete framework for calculating true project profitability — from the correct formula, to tool overhead allocation, to tax calculation, to the pre- and post-project checklists that turn profitability tracking from a retrospective exercise into a forward-looking business management tool. The goal: complete clarity on what every project actually earns, so that freelance websites users can make pricing, platform, and client decisions based on real numbers rather than gross invoice amounts.
Section 1: The True Project Profitability Formula
| Line | Component | Formula / Calculation | Example ($5,000 Project) |
|---|---|---|---|
| A | Gross Invoice Amount | What the client pays (before any deductions) | $5,000.00 |
| B | Platform Commission | A × commission rate; Jobbers.io: $0; Upwork typical: A × 10%; Fiverr: A × 20% | Jobbers.io: $0 / Upwork 10%: $500 / Fiverr 20%: $1,000 |
| C | Payment Processing Fee | (A − B) × payment method fee; Wise: 0.5-1%; Payoneer cross-currency: up to 2%; SWIFT: flat $35-$100 | Wise 0.8%: $40 / Payoneer 2%: $100 / SWIFT: $50 |
| D | Direct Tool Costs | Any tools specifically purchased or upgraded for this project | Stock photos for client: $35 / No project-specific tools: $0 |
| E | Allocated Tool Overhead | Actual project hours × (Annual tool spend ÷ Annual billable hours); at $3,000/yr tools ÷ 1,175 hrs = $2.55/hr | 50 actual hours × $2.55 = $127.50 |
| F | Total Hours (Actual, Including Non-Billable) | Delivery hours + revision hours beyond scope + client communication + admin + proposal time for this project | Quoted 40 hrs; actual delivery 45 hrs; client comms 5 hrs; admin 2 hrs; proposal 3 hrs = 55 total hours |
| G | Operating Cost per Hour | (Annual overhead + tax buffer) ÷ Annual billable hours; or simply: your MVR for this calculation | At $85 MVR: F × G = 55 × $85 = $4,675 total cost of time investment |
| H = A−B−C−D−E | Net Revenue (before tax) | Gross minus all direct costs except time cost | Jobbers.io + Wise: $5,000 − $0 − $40 − $0 − $127.50 = $4,832.50 |
| I = H × tax rate | Tax Liability Estimate | H × effective tax rate; US: 28-38%; UK: 30-45%; Qatar/UAE/Bahrain: 0% | US at 30%: $4,832.50 × 0.30 = $1,449.75 |
| J = H − I | Net Profit after Tax | Revenue remaining after all costs and tax | $4,832.50 − $1,449.75 = $3,382.75 |
| K = J ÷ F | Effective Hourly Rate (Net, After Tax) | True take-home per hour of total time invested | $3,382.75 ÷ 55 hrs = $61.50/hr |
| L = J ÷ A | Project Profitability Rate (%) | Net profit as % of gross invoice — the true profitability rate | $3,382.75 ÷ $5,000 = 67.7% |
| M = K vs MVR | Profitability vs. Minimum Viable Rate | Is K above or below MVR? If below: the project is consuming resources faster than it is generating sustainable income | $61.50/hr vs MVR $85/hr → project delivered below MVR; identify which component caused the shortfall |
Section 2: Platform Commission Impact — The Biggest Controllable Variable
For freelancers on freelance websites, platform commission is the most immediately actionable profitability lever — it determines how much of every invoice survives before any other cost is applied.
Table 2.1: Same Project, Different Platforms — Profitability Comparison
| Platform | Commission | Gross Invoice ($5,000 project) | Commission Deducted | Remaining after Commission | After Wise (0.8%) + 30% tax | True Net Profit | Project Profitability % |
|---|---|---|---|---|---|---|---|
| Jobbers.io | 0% | $5,000 | $0 | $5,000 | $4,960 − $1,488 tax = $3,472 | $3,472 | 69.4% |
| Upwork (best case 0%) | 0% variable | $5,000 | $0 | $5,000 | $4,960 − $1,488 = $3,472 | $3,472 | 69.4% |
| Upwork (typical 10%) | 10% | $5,000 | $500 | $4,500 | $4,464 − $1,339 = $3,125 | $3,125 | 62.5% |
| Upwork (worst 15%) | 15% | $5,000 | $750 | $4,250 | $4,216 − $1,265 = $2,951 | $2,951 | 59.0% |
| Fiverr | 20% | $5,000 | $1,000 | $4,000 | $3,968 − $1,190 = $2,778 | $2,778 | 55.6% |
| LinkedIn Integrated (13%) | ~13% | $5,000 | $650 | $4,350 | $4,315 − $1,295 = $3,020 | $3,020 | 60.4% |
Assumes: Wise 0.8% payment processing on net revenue; 30% effective US tax rate; no tool overhead or scope creep in this comparison (these are applied uniformly across all platforms and would reduce all figures equally). Jobbers.io vs. Fiverr difference on a single $5,000 project: $694. At 20 projects/year: $13,880/year difference — entirely from platform selection.
Table 2.2: 5-Year Platform Commission Cost at $60,000 Annual Billing
| Platform | Annual Commission | 5-Year Commission Total | 5-Year True Net (after 30% tax on retained income) | 5-Year Advantage vs. Fiverr |
|---|---|---|---|---|
| Jobbers.io 0% | $0 | $0 | $210,000 (60K × 5 × 0.70 after tax) | +$42,000 over 5 years |
| Upwork typical 10% | $6,000 | $30,000 | $189,000 | +$21,000 |
| Fiverr 20% | $12,000 | $60,000 | $168,000 | Baseline |
Section 3: Tool Overhead — What Your Software Actually Costs Per Project
For freelancers on freelance websites, tool costs are invisible on the invoice but entirely real in the P&L. Without systematic allocation, a freelancer spending $500/month on software is silently subsidising every client project from their take-home income rather than pricing it in.
Table 3.1: Common Freelancer Tool Stack — Annual Cost Inventory
| Tool Category | Tool | Monthly Cost | Annual Cost | Who Primarily Uses It |
|---|---|---|---|---|
| Design | Adobe Creative Cloud (All Apps) | $54.99 | $659.88 | Graphic designers, video editors, photographers |
| Design | Figma Professional | $12/editor | $144 | UX/UI designers, product designers |
| Design | Canva Pro | $12.99 | $155.88 | Marketers, content creators, general design |
| AI / Development | GitHub Copilot | $10-$19 | $120-$228 | Software developers |
| AI / Development | Cursor AI | $20 | $240 | Software developers, engineers |
| Project Management | Notion (Personal Pro) | $10-$15 | $120-$180 | All freelancers for notes, wikis, client docs |
| Project Management | Asana Starter | $10.99 | $131.88 | Freelancers with multiple concurrent projects |
| Project Management | Linear (member) | $8 | $96 | Software developers, technical project managers |
| Communication | Zoom Pro | $13.33 | $159.96 | All freelancers with international clients |
| Communication | Loom (Starter) | $12.50 | $150 | Video-first communicators, product teams |
| Communication | Slack Pro | $7.25-$12.50 | $87-$150 | Freelancers embedded in client teams |
| Productivity | Google Workspace Business Starter | $6/user | $72 | Freelancers using professional email domain |
| Accounting | QuickBooks Self-Employed | $15 | $180 | US freelancers with simple income structure |
| Accounting | QuickBooks Online Simple Start | $30 | $360 | US freelancers with employees or complex accounts |
| Accounting | Xero Starter | $29 | $348 | UK/AU/NZ freelancers; international |
| CRM / Sales | HubSpot CRM Starter | $45 | $540 | Freelancers with active sales pipeline and >20 prospects |
| Contracts | DocuSign Personal | $15-$25 | $180-$300 | Freelancers with frequent contract needs |
| Scheduling | Calendly Standard | $10 | $120 | Freelancers with regular discovery calls |
| Video | Loom (async video) | $12.50 | $150 | UX/UI, product, marketing — async client delivery |
Table 3.2: Tool Overhead Allocation by Freelancer Profile
| Freelancer Profile | Likely Tool Stack | Annual Tool Spend | Annual Billable Hours | Tool Cost per Billable Hour | Cost on 40-Hour Project |
|---|---|---|---|---|---|
| Minimalist writer/editor | Google Workspace + Grammarly + Notion | ~$300/year | 1,175 hours | $0.26/hour | $10.24 |
| Developer (standard) | GitHub Copilot + Cursor + Linear + Zoom + Notion | ~$800/year | 1,175 hours | $0.68/hour | $27.23 |
| Graphic designer | Adobe CC + Figma + Canva + Zoom + QuickBooks | ~$1,300/year | 1,175 hours | $1.11/hour | $44.26 |
| Digital marketer | Canva + HubSpot + Zoom + Asana + QuickBooks + various analytics tools | ~$2,000/year | 1,175 hours | $1.70/hour | $68.09 |
| Full-stack senior developer | GitHub Copilot + Cursor + Adobe CC + Figma + Linear + Zoom + Notion + QuickBooks + DocuSign | ~$2,800/year | 1,175 hours | $2.38/hour | $95.32 |
| Full-service freelancer (all-in) | Adobe CC + Figma + Cursor + HubSpot + Asana + Zoom + Notion + DocuSign + QBO + Calendly + Loom | ~$4,500/year | 1,175 hours | $3.83/hour | $153.19 |
Annual billable hours: 1,175 (47 working weeks × 25 billable hours/week per FreelanceFin August 2025). Tool cost per billable hour = annual tool spend ÷ 1,175. Cost on 40-hour project = tool rate × 40 hours.
Section 4: Scope Creep Calculator — The Hidden Profitability Killer
| Scope Creep Scenario | Quoted Hours | Actual Hours | Scope Creep % | Uncompensated Hours | Revenue Shortfall (at $80/hr) | Effective Hourly Rate on $4,000 Quote |
|---|---|---|---|---|---|---|
| Well-scoped project (ideal) | 50 | 50 | 0% | 0 | $0 | $80/hr (on target) |
| Minor scope expansion (typical) | 50 | 58 | 16% | 8 | $640 | $69/hr (−14%) |
| Moderate scope creep (common) | 50 | 65 | 30% | 15 | $1,200 | $61.50/hr (−23%) |
| Significant scope creep | 50 | 75 | 50% | 25 | $2,000 | $53.33/hr (−33%) |
| Severe scope creep (open-ended projects) | 50 | 100 | 100% | 50 | $4,000 | $40/hr (−50%) — below most MVRs |
Revenue shortfall = uncompensated hours × $80/hr (illustrative billable rate). Effective hourly rate = project quote ÷ actual hours. A freelancer whose MVR is $80/hr and experiences 50% scope creep on every project is effectively delivering work below cost every time — a loss that compounds across the entire client portfolio.
Scope Creep Prevention: Key Contract Clauses
| Contract Element | Recommended Language / Structure | Why It Works |
|---|---|---|
| Deliverables list | Specific, numbered deliverables: ‘3 homepage design concepts; 2 rounds of revisions on the selected concept; final design files in specified formats’; NOT: ‘design the website’ | Makes scope expansion visible and contractual rather than implicit |
| Revision limit | ‘This agreement includes 2 rounds of revisions. Additional revision rounds are available at $[rate]/round or $[rate]/hour, approved in writing before commencement’ | Converts unlimited revision expectation into a commercial conversation |
| Change order clause | ‘All work beyond the agreed deliverables scope requires a written Change Order before commencement; Change Orders are billed at $[rate]/hour’ | Creates a formal process for additions that prevents informal scope expansion |
| Communication included | ‘This agreement includes one 60-minute kickoff call, weekly 30-minute progress calls, and email communication within agreed response time. Additional calls or meetings are billed at $[rate]/hour’ | Prevents unlimited meeting and call overhead from consuming billable capacity |
| Milestone payment | ‘50% of the project fee due upon signing; 50% due upon delivery of final approved deliverables’ | Reduces financial risk; aligns payment with project gates rather than undefined ‘completion’ |
| Scope buffer in hours | Add 15-25% to estimated hours BEFORE quoting; quote a fixed price based on the buffered estimate | Provides internal padding for reasonable project evolution without triggering change orders for every minor addition |
Section 5: Tax Allocation by Jurisdiction
Tax jurisdiction is the single biggest variable in project profitability outside platform commission — creating a spread of 0% (Gulf markets) to 55% (some European jurisdictions) on the same gross invoice. Freelancers on freelance websites can influence this variable through geographic residency choices as well as through jurisdiction-specific legal structures.
For freelancers on freelance websites in different countries, the tax component of project profitability varies dramatically — from 0% in Gulf markets to 40-55% in some European jurisdictions. Building the correct tax rate into every project profitability calculation is essential.
| Country | Tax Components | Effective Combined Rate (typical mid-range) | Recommended Per-Project Reserve | Tax on $5,000 Project Net Profit |
|---|---|---|---|---|
| Qatar / UAE / Bahrain | 0% personal income tax; possible VAT on Bahraini/UAE business services (10%/5% above threshold) | 0% personal income | 0% income tax reserve; check VAT if billing locally above threshold | $0 |
| United States (national average) | SE tax 15.3% + federal income tax 22-37% + state tax 0-13%; effective combined mid-range | 28-38% (varies significantly by state) | 30% reserve on every invoice as standard | $1,500 at 30% rate |
| United Kingdom | Income Tax 20-45% + NICs Class 4 (9-2%) | 30-45% | 35% reserve for mid-range income freelancer | $1,750 at 35% rate |
| Germany (Freiberufler) | Income tax 14-45% + health insurance 14.6-16% + pension 18.6% + care 3.4% | 40-55% | 45% reserve; consult a Steuerberater (tax advisor) | $2,250 at 45% rate |
| France (auto-entrepreneur) | Charges sociales 22-23.1% + income tax IRPP (progressive) | 35-50% | 40% reserve | $2,000 at 40% rate |
| Australia | Income tax 0-45% + Medicare levy 2% | 30-40% | 32% reserve for mid-income freelancer | $1,600 at 32% rate |
| Canada | Federal income tax 15-33% + CPP contributions 9.9-11.9% + provincial tax 5.05-21% | 30-45% | 35% reserve | $1,750 at 35% rate |
| Poland (IP Box) | 5% preferential rate for qualifying IP income (software developers); standard 12-32% | 5-32% depending on structure | 10% for IP Box qualifying; 25% standard | $250-$1,250 |
| Morocco (Auto-Entrepreneur) | AE flat tax ~1% of turnover for services (below MAD 500,000/year) | ~1% of turnover under AE regime | 1.5% reserve (margin above 1%) | ~$50 at 1% of gross |
Tax rates are simplified estimates. Actual tax depends on specific income level, deductions, domicile, and year. Consult a qualified tax professional in your jurisdiction for accurate calculations. Gulf rates reflect personal income tax only; VAT obligations vary by country and business revenue threshold.
Section 6: The Complete Profitability Calculator — Worked Examples
Table 6.1: Three Freelancers, Same Gross Revenue, Different True Profitability
| Metric | Freelancer A (Fiverr; US; no scope management) | Freelancer B (Upwork 10%; UK; moderate scope) | Freelancer C (Jobbers.io 0%; UAE 0% tax; tight scope) |
|---|---|---|---|
| Gross annual billing | $80,000 | $80,000 | $80,000 |
| Platform commission | $16,000 (20% Fiverr) | $8,000 (10% Upwork) | $0 (0% Jobbers.io) |
| Payment processing | $1,600 (2% Payoneer cross-currency) | $720 (0.9% Wise average) | $400 (0.5% Wise average) |
| Tool overhead | $2,500/year | $3,500/year | $3,000/year |
| Scope creep loss | $8,000 (uncompensated time from 25% scope creep) | $5,000 (15% scope creep, some recovered via change orders) | $1,000 (5% scope creep, tight contracts) |
| Gross profit before tax | $80,000 − $16,000 − $1,600 − $2,500 − $8,000 = $51,900 | $80,000 − $8,000 − $720 − $3,500 − $5,000 = $62,780 | $80,000 − $0 − $400 − $3,000 − $1,000 = $75,600 |
| Tax | 30% US: $15,570 | 35% UK: $21,973 | 0% UAE: $0 |
| True annual net profit | $36,330 | $40,807 | $75,600 |
| True profit as % of gross billing | 45.4% | 51.0% | 94.5% |
| 5-year cumulative net profit | $181,650 | $204,035 | $378,000 |
| Freelancer C advantage over A (5 years) | — | — | +$196,350 over 5 years |
All three freelancers have identical $80,000 gross billing. The difference is entirely in platform selection, payment method, scope management, and tax jurisdiction. Freelancer C’s advantage is driven by: 0% commission ($16,000/year saved vs. A), 0% UAE personal income tax ($22,680/year saved vs. US tax), better payment method ($1,200/year saved vs. Payoneer 2%), and tighter scope management ($7,000/year saved vs. A). These compounding advantages produce $196,350 more over 5 years from identical work volume.
Section 7: The Pre- and Post-Project Profitability Checklist
For freelancers on freelance websites, a consistent project checklist applied before every quote and after every project close converts project profitability from a retrospective surprise into a forward-looking management tool.
Pre-Project Checklist (Apply Before Quoting)
| # | Check | Action | Pass Condition |
|---|---|---|---|
| 1 | Hours estimate with scope buffer | Estimate delivery hours; add 15-25% buffer; define what is and is not included | Buffer applied; deliverables list written |
| 2 | Platform commission applied | If on Fiverr: multiply quote by 1.25 to net target rate; Upwork 10%: multiply by 1.111; Jobbers.io 0%: quote = target rate | Quote reflects net target rate after commission |
| 3 | Payment processing included | Add Wise 0.5-1% or Payoneer 2% or SWIFT $35-$100 to profitability model (not necessarily to client quote, but to internal profit calculation) | Payment cost included in profit projection |
| 4 | Tool overhead allocated | Multiply buffered hours by tool overhead rate per hour | Tool cost included in profit projection |
| 5 | Tax reserve calculated | Multiply projected net profit by effective tax rate; verify quote leaves adequate profit after tax | After-tax profit exceeds personal income target contribution from this project |
| 6 | Effective hourly rate check | Divide projected net-net-net profit by total estimated hours (including buffer); compare to MVR | Effective hourly rate ≥ MVR |
| 7 | Payment terms confirmed | 50% upfront for projects over $1,000; net-7 for retainers; milestone structure for complex projects | Contract includes milestone payment terms |
| 8 | Scope definition written | Deliverables list, revision limit, change order clause drafted for contract | All three elements present in contract draft |
Post-Project Checklist (Apply After Project Closes)
| # | Metric | Action | Insight Generated |
|---|---|---|---|
| 1 | Log actual hours (all categories) | Record delivery + revisions + client comms + admin for this project | Reveals true time investment vs. estimate |
| 2 | Calculate scope creep rate | (Actual hours ÷ quoted hours − 1) × 100% | Identifies whether quote accuracy is improving or deteriorating |
| 3 | Calculate effective hourly rate | Net revenue after commission ÷ actual total hours | Compares to MVR; reveals profitability reality |
| 4 | Compare to pre-project projection | Identify the single largest variance between projected and actual profit | Pinpoints the top priority for improvement on next similar project |
| 5 | Log payment performance | Did client pay on time? Which transfer method was used? Were there fees? | Identifies clients with poor payment behaviour; confirms optimal payment method for this client |
| 6 | Update client profitability record | Add this project to the 12-month running total for this client | Enables annual client profitability ranking |
| 7 | Log one improvement for next project | A specific action: tighter scope wording, shorter revision cycle, different payment method, higher rate, different platform | Progressive improvement mechanism; each project informs the next |
Key Resources — Project Profitability for Freelancers 2026
- Jobbers.io — 0% Commission Global Freelance Marketplace — The Single Biggest Profitability Variable Under a Freelancer’s Control: Eliminating Platform Commission Immediately Adds 10-25% to Project Profitability Without Changing a Single Client Rate
- Jobbers.ma — 0% Commission Trilingual Arabic/French/English — For Moroccan and Francophone MENA Freelancers: Zero Platform Commission on Every Project, Combined with Regional Expertise in Arabic and French EU Client Markets
- FreelanceFin August 2025 — How to Set Freelance Rates: base rate formula; total annual billable hours 1,175 (47 weeks × 25 hrs/week); tax buffer 25-30%; 15-25% scope buffer; MVR calculation; demand signals for rate increases; complete breakdown of hourly rate components
- SelfEmployed November 2025 — Freelance Rate Formula with Examples: realistic billable hours 900-1,400/year; tax 25-30% set-aside; non-billable time patterns from documented freelancer schedules; $35/hr → $80/hr rate increase case study; market validation alongside formula
- Plutio Rate Calculator — Toggl time-tracking data: avg freelancer 60-70% billable hours; employer payroll taxes 7.65%; Kaiser Family Foundation health insurance $6,584/yr employer average; 401K match 3-6%; 15 days PTO ~6% of salary; equipment/software $1,000-3,000/yr; profit margin 10-20% minimum; complete overhead breakdown from employer-covered benefits freelancers now pay independently
- BuildFolio March 2026 — Contractor Hourly Rate Calculator: overhead = 30-50% of revenue; overhead breakdown (insurance, vehicle, tools, marketing, software, licensing); non-billable time categories; three rates confusion (employee rate, owner rate, billed rate); most contractors underestimate non-billable time significantly; formula: (salary + overhead + profit target) ÷ billable hours
- Digitsum Freelance Rate Calculator — Planning range 25-35% overhead + tax; most freelancers bill 60-75% of working hours = 25-35 billable hours/week; $100K income target + 25% overhead + 30 billable hrs/week + 48 weeks = $92.59/hr minimum; daily rate = hourly × 6-7 hours; worked examples with varying overhead rates
- Jobbers.io — Upwork Fees Explained January 2026: variable fee 0-15% from May 1, 2025; average effective 12-13%; total 15-20% including Connects + withdrawal; annual cost for $50K earner: $6K-$10K; Connects $0.15 each; Freelancer Plus $14.99-$19.99/month; complete hidden cost breakdown; comparison to $0 on Jobbers.io
- Wise — Payment Processing: Q4 2025: 74% of transfers instant under 20 seconds; 0.35-1.5% variable fee major pairs; mid-market rate; no monthly fee; lowest-cost mainstream international payment method; recommended primary payment for Jobbers.io projects to minimise payment processing deduction from project profitability
- Jobbers.io Freelance Benchmark Report 2026 — February 2026: Payoneer 57% international rate premium for freelancers with international clients; 300,000+ daily visits; 0% commission; confirmed largest zero-commission marketplace 2026; 4.2-month average income replacement (500-freelancer study 2024-2025); 0% commission is the highest single-variable profitability improvement available to most freelancers





