Internal Finance

Retained profit is profit that a business keeps and reinvests in itself (1) rather than distributing it to the owners (as dividends) (1).

Retained profit is internal finance that carries no interest and no repayment obligation (Knowledge 1). SoleCraft can fund its small expansion from profit it has kept, avoiding the interest and monthly repayments a bank loan would demand (Application 2). This keeps SoleCraft's costs and cash-flow pressure low and leaves the owner in full control — with no lender imposing conditions — making retained profit well-suited to a small, affordable expansion, although the amount available is limited (Analysis 1).

Limitation 1 — the amount is limited. Internal finance is capped by what the firm has (Knowledge). For a small firm like GrowFast, its owner's savings, retained profit and saleable assets may be far too little to fund a rapid expansion of its production capacity (Application). As a result, GrowFast may be unable to fund the full capital outlay, forcing it to scale up more slowly or miss the growth opportunity altogether (Analysis).

Limitation 2 — opportunity cost. Using internal funds means they cannot be used elsewhere (Knowledge). If GrowFast ploughs its retained profit and the owner's savings into the expansion (Application), it forgoes the next-best use of that cash and leaves no working-capital buffer, so a cash-flow shock could threaten the business (Analysis).

Relying on retained profit has clear attractions for ProfitCo. It carries no interest and no repayments, so the expansion adds no cash-flow strain or borrowing cost, and it involves no loss of control — no lender conditions or new shareholders. As an established, profitable firm, ProfitCo has some retained profit available, making this a cheap, low-risk source of capital for extra production capacity.

However, for a major expansion, relying only on retained profit has real limits. The amount ProfitCo has retained may be too small to fund a large capital outlay, so using only retained profit could force ProfitCo to expand its capacity more slowly or on a smaller scale than the opportunity warrants. Ploughing all its retained profit into the expansion also leaves no working-capital buffer for emergencies and forgoes other uses of the cash, such as dividends or the next-best project (an opportunity cost).

Whether relying only on retained profit is a good approach therefore depends on the size of the expansion relative to ProfitCo's profits. For a modest expansion it is ideal — cheap and control-preserving. But for a major expansion, retained profit alone is likely insufficient and risky, so ProfitCo would be safer using a mix of retained profit and external finance (e.g. a loan), gaining the scale it needs while keeping some internal buffer. So retained profit should be part of the funding, but not necessarily all of it for a major expansion.

Replacing ageing plant and machinery is a defined, one-off capital need, and internal finance is one option for FamilyCo — but whether it is best depends on the cost and the alternatives.

The case for internal finance. As a small, profitable business, FamilyCo can use retained profit or owner's capital to fund the equipment with no interest, no repayments and no loss of control — keeping the family owners fully in charge and avoiding lender conditions. If the capital outlay is modest relative to its profits, this is cheap and low-risk, and quick to arrange.

The case against / alternatives. However, using internal finance has drawbacks. It has an opportunity cost — the cash could fund other projects or be kept as a working-capital buffer — and using it all could leave FamilyCo short of cash if trading dips. If the machinery is expensive, FamilyCo's internal funds may be insufficient. Alternatives suit this need well: a bank loan spreads the cost of a long-life productive asset over time (matching the payments to the asset's working life), while leasing avoids a large upfront outlay entirely, though both cost more overall and (for the loan) add repayments.

Judgement. On balance, internal finance is the best route for FamilyCo only if the equipment is affordable from its retained profit without draining its cash buffer — then it is the cheapest, control-preserving option. If the machinery is expensive, spreading the cost via a loan or lease is likely wiser, keeping FamilyCo's internal cash for day-to-day trading needs and matching the payment to the asset's long working life. So the best choice depends on the cost of the equipment relative to FamilyCo's funds and its need to preserve a cash buffer — internal finance for a small outlay, external for a large one.

For a profitable firm like ExpandCo, internal finance is an obvious way to fund growth — but 'mainly internal' has both strong advantages and real limits, so whether it is right depends on the scale of the growth, ExpandCo's finances and its appetite for control and risk.

The case for funding growth mainly internally. Using retained profit and other internal sources, ExpandCo avoids interest and repayments, so funding extra capacity adds no borrowing cost or cash-flow strain, and it keeps the owners in full control — no lender conditions and no dilution of ownership. Internal finance is also quick (no applications or credit checks) and, for a profitable firm, readily available. Relying on it signals financial strength and keeps ExpandCo's gearing low, reducing financial risk.

The case against — the limits of internal finance. However, significant growth may need more than ExpandCo's internal funds can provide, so funding it mainly internally could force ExpandCo to scale up its capacity too slowly and miss opportunities that rivals seize. Internal finance also carries an opportunity cost — retained profit reinvested is profit not paid to owners or used for the next-best project — and ploughing cash into growth could leave no working-capital buffer for a downturn, ironically raising risk. External finance (loans, share capital) could fund faster, larger growth and spread its cost over the asset's earning life.

Evaluation. Whether ExpandCo should fund growth mainly internally depends on several factors. It depends on the scale of growth relative to its retained profit: modest growth can be internally funded, but large-scale growth likely needs external finance too. It depends on ExpandCo's cash position and risk appetite: keeping a buffer and low gearing favours some internal funding, but not at the cost of missing growth. It depends on the cost and availability of external finance — cheap loans might make borrowing attractive, while expensive finance favours internal funds. And it depends on the owners' priority on control: internal finance preserves it, external (especially equity) dilutes it.

Conclusion. On balance, ExpandCo should use internal finance as a major part of funding its growth — it is cheap, control-preserving and low-risk — but funding significant growth mainly internally is likely to be too limiting. The best approach is usually a blend: use retained profit to fund what it comfortably can (keeping gearing low and a cash buffer), and add external finance (a loan, or share capital if incorporated) to reach the scale the growth opportunity requires. So ExpandCo should lead with internal finance but not rely on it alone — the right mix depends on the size of the growth, its cash buffer, the cost of external finance, and how much control the owners want to keep.