Interestingly enough, I have been in at least 6 less-developed countries where it was impossible (as opposed to "more complicated and onerous") for a self-employed person to obtain a mortgage loan from an institutional lender. Their only sources of funding, other than family members, are money-lenders, who charge extortionate rates and break their legs if they don't pay.

A major problem with lending to the self-employed is documenting an applicant's income to the lender's satisfaction. Applicants with jobs can provide lenders with pay stubs, and lenders can verify the information by contacting the employer. With self-employed applicants, there are no third parties to verify such information.

Consequently, lenders fall back on income tax returns, which they typically require for 2 years. They feel safe in relying on income tax data because any errors will be in the direction of understating rather than overstating income. Of course, they don't necessarily feel safe that the W-2s given them are authentic rather than concocted for the purpose of defrauding them, so they will require that the applicant authorize them to obtain copies directly from the IRS.

The support it provides to self-employed loan applicants is an unappreciated benefit of our income tax system. It may not be fully appreciated, of course, by applicants who have understated their income. In countries where virtually no one pays income taxes because cheating is endemic, tax returns are useless for qualifying borrowers.

The second problem with lending to the self-employed is determining the stability of reported income. For this purpose, the lender wants to see an income statement for the period since the last tax return, and in some cases a current balance sheet for the business.

The two government-sponsored enterprises, Fannie Mae and Freddie Mac, who purchase enormous numbers of home loans in the secondary market, have developed detailed guidelines for qualifying self-employed borrowers. Lenders looking to sell such loans to the agencies must follow the guidelines. The problem is that implementation can be complicated and time-consuming, especially when the declared income comes from a corporation or a partnership. (If you own 25% or more, you are considered as "self-employed"). The mortgage broker who brushed you off didn't want to take the time, or may not have had anyone available with the skills needed to do it.

Most lenders offer "limited documentation" or "reduced documentation" loans to self-employed applicants who cannot demonstrate two years of sufficient income from their tax returns. These programs vary from lender to lender, but they all provide less favorable pricing and/or tougher underwriting requirements of other types. Lenders invariably require larger down-payments, and may also require a better credit score or higher cash reserves. In addition, they may limit the types of properties or types of loans that are eligible.