When Should You Quit Your Job for a Side Business? Buffer's Revenue Threshold
Short answer: Quit only when you have six months of essential personal expenses in accessible cash, owner-available cash after all business costs and a tax provision has covered those expenses for three consecutive months, and customer evidence shows the income is repeatable. Apply a 25% downside case before testing the cover. Leave earlier only as a deliberate, funded risk with a fixed review date.
Revenue matching salary is too demanding for some founders and dangerously loose for others. Your salary includes stability, benefits and paid time that business turnover does not replace.
The decision should be based on personal runway, business contribution and demand quality. Excitement belongs in none of those calculations.
Buffer's ramen-profitability target
Joel Gascoigne launched Buffer in late 2010 while doing contract development. Buffer's ten-year retrospective says his first goal was “ramen profitability”, defined for him as £1,200 a month, enough to cover living expenses. Buffer reached that level in early 2011, and Gascoigne gradually reduced his contracting days as revenue grew.
The product had produced a first paying customer within four days of its rough launch. By February 2011, Buffer reported more than 500 users and roughly 4% upgrading to paid plans in its seven-week founder account. Later that year, the company raised US$450,000.
The case supports staged reduction better than a dramatic resignation. It does not reveal Gascoigne's complete personal balance sheet, customer concentration or month-by-month contribution.
My view is that most founders should reduce employment or contracting in stages when possible. One extra business day can test whether more time creates more customers. Quitting all at once tests the same assumption with much higher personal pressure.
Use the Full-Time Readiness Threshold
The Full-Time Readiness Threshold requires all four lines to pass.
| Line | Test | Working pass condition | |---|---|---| | Personal runway | Accessible cash divided by essential monthly spend | Six months after transition costs | | Business cover | Monthly owner-available cash divided by essential spend | At least 1.0 for three months, including the downside case | | Demand quality | Retention, repeat orders and concentration | No single fragile source supports the case | | Time return | Extra day produces measurable progress | Trial shows customer or delivery gain |
The thresholds are working guides, not universal rules. A founder with dependants, debt or volatile health costs may need much more runway. Someone with a partner's secure income and a reversible career may consciously accept less.
Calculate the personal floor
List housing, food, utilities, transport, insurance, debt minimums, care, tax and essential health costs. Remove discretionary spending only if you will genuinely make the cut. Add business costs currently paid personally and one-off transition costs.
Do not use your current salary as the floor. Do not omit annual bills. Divide annual essentials by 12, then add a 10% contingency if the record is uncertain.
Employment, benefits, pension, insurance and tax treatment vary by country. Before resigning, check notice, restrictive covenants, intellectual-property terms and your self-employment obligations with qualified local legal and tax professionals.
Use owner-available cash, not turnover
For a service, contribution is client revenue less contractors, travel, payment fees and other direct delivery cost. For software, deduct hosting, payment and attributable support. For goods, deduct landed product, fulfilment, returns and sales-linked charges.
Then subtract all business fixed costs and a realistic provision for tax, National Insurance or equivalent local charges. Add the pension, insurance or other employment benefits you must now replace. The result is owner-available cash. A £3,000 monthly shop turnover may contribute £900 and leave much less available to the household. The guide on [whether a business can make money](/business-finance/can-this-business-make-money/) provides the broader unit-economics test.
Require three consecutive months because one launch, project or seasonal peak can create a false threshold. Use cohorts or repeat orders to inspect what supports the income.
Apply a downside case
Reduce forecast revenue or contribution by 25% as a simple first downside case, then replace that percentage with your actual volatility when you have enough records. Increase cancellation, late payment or returns where relevant.
The threshold passes only if runway and household obligations remain tolerable under the downside. Decide in advance what would trigger a return to employment, contracting or cost reduction.
Test the return on more time
Before resigning, take annual leave or reduce one working day for four to six weeks if possible. Decide what the extra time will do: contact 20 qualified prospects, shorten fulfilment or complete a saleable feature.
Compare output with the previous baseline. If extra time produces administrative polishing rather than customers or capacity, full-time work may not solve the constraint. The bottleneck could be weak demand, price or positioning.
Avoid using employer time, equipment, confidential information or customer relationships without permission. Your contract and local law govern ownership and conflicts.
Worked example: SocialQueue
SocialQueue is a side-business scheduling service. Its founder's essential personal spending is £1,850 monthly. Transition costs, including insurance and tax advice, are £1,200. These figures are illustrative.
Accessible savings are £14,000. After transition costs, runway is £12,800 divided by £1,850 = 6.92 months.
SocialQueue has 145 customers paying £19 a month, producing 145 x £19 = £2,755 revenue. Hosting, payments and support cost £4.20 per account, or 145 x £4.20 = £609. Monthly contribution is £2,146. Fixed business overhead is £240, and the founder uses a 25% tax and National Insurance provision on the remainder. The percentage is illustrative and must be replaced with qualified advice for the founder's structure and jurisdiction.
| Threshold | Calculation | Result | |---|---:|---:| | Owner-available cash | (£2,146 minus £240) x 75% | £1,429.50 | | 25% downside contribution | £2,146 x 75% | £1,609.50 | | Downside owner-available cash | (£1,609.50 minus £240) x 75% | £1,027.13 | | Downside household cover | £1,027.13 divided by £1,850 | 0.56 |
The headline threshold passes, but the downside fails. Also, one affiliate supplies 42% of new customers. SocialQueue does not resign yet.
The founder reduces employment to four days for six weeks. The extra day is allocated to direct partnerships. It produces 26 trials, eight paying accounts and a second acquisition source. The eight accounts add 8 x (£19 minus £4.20) = £118.40 contribution, taking the total to £2,264.40, while the largest source falls to 29%. Under the same assumptions, downside owner-available cash is ((£2,264.40 x 75%) minus £240) x 75% = £1,093.73, still well below essential spending.
The founder sets a final gate: at least £3,650 contribution for three months, no source above 30% and £15,000 post-transition cash. At £3,650 contribution, the downside leaves ((£3,650 x 75%) minus £240) x 75% = £1,873.13 owner-available cash. The calculation must be refreshed if overhead or tax changes. This is a dated threshold, not an emotional delay.
Decide what quitting is intended to change
Write the next 90 days of full-time work before giving notice. Allocate hours to acquisition, delivery, product and administration. Tie each block to an outcome.
If demand is already greater than capacity, more time can release additional revenue. If there are few enquiries, leaving employment creates time but not a market. Validate demand through [getting your first 10 customers](/sales-and-marketing/how-to-get-your-first-10-customers/) before turning absence of time into the default explanation.
Make the decision in six weeks
In week one, calculate essential personal spend, transition costs, accessible cash and business contribution. In week two, inspect retention, repeat orders and acquisition concentration. Run the downside case.
Use weeks three to six for a reduced-hours or leave experiment where possible. Record exactly what the additional time produces. At the end, choose stay, reduce hours or resign. Put a 90-day review and return-to-income trigger in writing before notice is submitted.
Related guides
Frequently asked questions
Do I really need six months of savings?
Six months is a working guide, not a rule. You may need more when income is seasonal, dependants rely on you, debt is inflexible or returning to work would take time. You may consciously accept less when household income is diversified and the decision is reversible. Calculate cash after transition costs and ring-fence tax. Do not count an undrawn credit card as runway. The useful question is how many months you can meet obligations in a downside case without forcing bad customer or financing decisions.
Should business revenue equal my salary before I leave?
No. Compare business contribution with essential personal costs and new business overhead, then consider the value of lost employment benefits and pension. Salary replacement can be unnecessarily high if your essentials are much lower, or dangerously low if turnover has thin margins. Require a repeated result rather than one month. Decide which lifestyle costs are genuinely optional now. If the business must fund a team or inventory before paying you, include those commitments. Revenue itself is not available household income.
What if my employment contract restricts the side business?
Read the contract and policies before selling, soliciting or using work product. Restrictions may cover outside work, conflicts, customers, confidential information and intellectual property. Their meaning and enforceability vary by jurisdiction. Do not assume work created at home is automatically yours if it relates to your employment. Obtain qualified local legal advice where the business overlaps with the employer or the clause is unclear. A clean written permission or carefully separated operation is far cheaper than a later ownership dispute.
Can I count expected investment as runway?
Count only cash that is committed under completed terms and genuinely available for the intended costs. Investor interest, an application or a verbal promise is not runway. Even committed funding may have conditions, delays and restrictions. Model the business without it and decide what changes if it arrives. Personal runway and company runway are separate unless the financing explicitly supports founder pay. Securities, tax and company obligations vary, so obtain qualified advice before relying on investment proceeds for personal income.
Is reducing my working week better than quitting?
Often, because it creates a live test of whether additional time produces customer or capacity gains while retaining income. It is not always available, and a fragmented week can slow deep product work. Agree the arrangement with your employer and keep boundaries clear. Give the extra day a measured job rather than general business activity. After four to six weeks, compare sales, delivery and energy with the baseline. If nothing material changes, investigate demand and offer quality before buying even more time.
What is a sensible return-to-employment trigger?
Use a cash and evidence trigger decided before financial pressure rises. For example, seek paid work when personal runway reaches four months, contribution stays below 75% of essentials for two months or a major customer leaves without replacement pipeline. Starting a serious job search takes time, so the trigger should occur well before cash is critical. Review it monthly. Returning to contracting or employment is not proof the business failed; it can preserve negotiating power and finance another better-defined cycle.
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